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Forces other than damaging winds are also at work inside tornadoes (龙卷风) . Sometimes,as the wind passes a house, the walls and ceiling burst apart as if a bomb had gone off inside. This explosion is caused by the low air pressure at the center of a tornado.
The pressure at the center of a tornado is usually 13 pounds per square inch. However,inside the house the air pressure is normal, about 15 pounds per square inch.The difference of 2 pounds per square inch between the inside and outside pressure may not seem like much. But suppose a tornado passes over a small building that measures 20 by 10 by feet. On each square inch of the building, there is 2 pounds of pressure from the inside
that is not balanced by air pressure outside the building. On the ceiling, that adds up to an unbalanced pressure of 57600 pounds. The pressure of the four walls adds up to 172800 pounds.
If windows are open in the building, some of the inside air will rush out through them.This will balance the pressure inside and outside the building.But if the windows are shut tightly, the huge inside pressure may cause the building to burst.
Unfortunately, heavy rain often occurs in the storms that later produce tornadoes,so people often shut their windows. This may cause far worse damage later.
21、 What did the paragraph before this passage most probably discuss?
A、 Measuring rainfall from a storm
B、 The kinds of damage caused by explosions
C、 The powerful winds of tornadoes
22、 Which of the following is the main topic of the passage?
A、 How tornadoes can be prevented
B、 When tornadoes usually occur
C、 Why tornadoes cause so much damage
23、 Tornadoes can destroy buildings because the()
A、 force of a tornado increases the air pressure in a building
B、 air pressure inside a tornado is less than the air pressure inside a building
C、 air pressure at the center of a tornado is over 172000 pounds
24、 What is the difference per square inch between the air pressure inside a building and the air pressure inside a tornado?
A、 2 pounds
B、 13 pounds
C、 15 pounds
25、 What would happen if the windows are shut tightly in the stormy weather?
A、 Tornadoes may be formed
B、 The house may be apart
C、 There may not be any pressure inside the building
参考答案
更多 “ Forces other than damaging winds are also at work inside tornadoes (龙卷风) . Sometimes,as the wind passes a house, the walls and ceiling burst apart as if a bomb had gone off inside. This explosion is caused by the low air pressure at the center of a tornado.The pressure at the center of a tornado is usually 13 pounds per square inch. However,inside the house the air pressure is normal, about 15 pounds per square inch.The difference of 2 pounds per square inch between the inside and outside pressure may not seem like much. But suppose a tornado passes over a small building that measures 20 by 10 by feet. On each square inch of the building, there is 2 pounds of pressure from the insidethat is not balanced by air pressure outside the building. On the ceiling, that adds up to an unbalanced pressure of 57600 pounds. The pressure of the four walls adds up to 172800 pounds.If windows are open in the building, some of the inside air will rush out through them.This will balance the pressure inside and outside the building.But if the windows are shut tightly, the huge inside pressure may cause the building to burst.Unfortunately, heavy rain often occurs in the storms that later produce tornadoes,so people often shut their windows. This may cause far worse damage later.21、 What did the paragraph before this passage most probably discuss?A、 Measuring rainfall from a stormB、 The kinds of damage caused by explosionsC、 The powerful winds of tornadoes22、 Which of the following is the main topic of the passage?A、 How tornadoes can be preventedB、 When tornadoes usually occurC、 Why tornadoes cause so much damage23、 Tornadoes can destroy buildings because the()A、 force of a tornado increases the air pressure in a buildingB、 air pressure inside a tornado is less than the air pressure inside a buildingC、 air pressure at the center of a tornado is over 172000 pounds24、 What is the difference per square inch between the air pressure inside a building and the air pressure inside a tornado?A、 2 poundsB、 13 poundsC、 15 pounds25、 What would happen if the windows are shut tightly in the stormy weather?A、 Tornadoes may be formedB、 The house may be apartC、 There may not be any pressure inside the building ” 相关考题
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In his composition there are ________errors _______a few misspellings.A: no other ... thanB: some other ... thanC: more ... thanD: other ... than
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共用题干
Tornadoes- The Power of the NatureMother nature bestows so much on mankind so that we can survive the cruelty of the environment,though sometimes,she'd like to give us some kind of test.Tornadoes（龙卷风）and heavy thunderstorms rushed across the Great Lakes and into Trumbull County on Saturday evening. The storms were dramatic and dangerous.George Snyder was riding the fire truck down Route 88 when he first noticed that a funnel（漏斗状的）cloud was behind him. "I stopped the truck and watched the funnel cloud. It was about 100 feet off the ground and I saw it go up and down for a while.It was moving toward Bradley Road and then suddenly it disappeared,"Snyder said.Snyder only saw one of the funnel clouds that passed through northeastern Ohio on Saturday.In Trumbull County,a tornado turned trees onto their sides.Some trees fell onto houses and cars. Other trees fell into telephone and electrical wires as they went down.Amanda Symcheck was having a party when the storm began."I knew something was wrong," she said."I saw the sky go green and pink（粉红色）.Then it sounded like a train rushing toward the house.I started crying and told everyone to go to the basement for protection."The tornado caused a lot of damage to cars and houses in the area. It will take a long time and much money to repair everything. There was also serious water damage from the thunderstorms.The heavy rains and high wind caused the power to go out in many homes.The storms caused serious flooding in areas near the river. More than four inches of rain fell in parts of Trumbull County.The river was so high that the water ran into streets and houses.Many streets had to be closed to cars and trucks because of the high water. This made it difficult for fire trucks,police cars,and other rescue vehicles to help people who were in trouble.Many people who live near the river had to leave their homes for their own safety.Some people reported five feet of water in their homes.Local and state officials opened emergency shelters for the people who were evacuated（撤走）.The Red Cross served meals to them."This was a really intense storm,"said Snyder."People were afraid.Mother Nature can be fierce.We were lucky this time.No one was killed."The weather was nice in Trumbull County on Saturday evening.A:Right B:Wrong C:Not mentioned
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共用题干
Tornadoes- The Power of the NatureMother nature bestows so much on mankind so that we can survive the cruelty of the environment,though sometimes,she'd like to give us some kind of test.Tornadoes（龙卷风）and heavy thunderstorms rushed across the Great Lakes and into Trumbull County on Saturday evening. The storms were dramatic and dangerous.George Snyder was riding the fire truck down Route 88 when he first noticed that a funnel（漏斗状的）cloud was behind him. "I stopped the truck and watched the funnel cloud. It was about 100 feet off the ground and I saw it go up and down for a while.It was moving toward Bradley Road and then suddenly it disappeared,"Snyder said.Snyder only saw one of the funnel clouds that passed through northeastern Ohio on Saturday.In Trumbull County,a tornado turned trees onto their sides.Some trees fell onto houses and cars. Other trees fell into telephone and electrical wires as they went down.Amanda Symcheck was having a party when the storm began."I knew something was wrong," she said."I saw the sky go green and pink（粉红色）.Then it sounded like a train rushing toward the house.I started crying and told everyone to go to the basement for protection."The tornado caused a lot of damage to cars and houses in the area. It will take a long time and much money to repair everything. There was also serious water damage from the thunderstorms.The heavy rains and high wind caused the power to go out in many homes.The storms caused serious flooding in areas near the river. More than four inches of rain fell in parts of Trumbull County.The river was so high that the water ran into streets and houses.Many streets had to be closed to cars and trucks because of the high water. This made it difficult for fire trucks,police cars,and other rescue vehicles to help people who were in trouble.Many people who live near the river had to leave their homes for their own safety.Some people reported five feet of water in their homes.Local and state officials opened emergency shelters for the people who were evacuated（撤走）.The Red Cross served meals to them."This was a really intense storm,"said Snyder."People were afraid.Mother Nature can be fierce.We were lucky this time.No one was killed."Several people were missing during the storm.A:Right B:Wrong C:Not mentioned
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共用题干
Tornadoes- The Power of the NatureMother nature bestows so much on mankind so that we can survive the cruelty of the environment,though sometimes,she'd like to give us some kind of test.Tornadoes（龙卷风）and heavy thunderstorms rushed across the Great Lakes and into Trumbull County on Saturday evening. The storms were dramatic and dangerous.George Snyder was riding the fire truck down Route 88 when he first noticed that a funnel（漏斗状的）cloud was behind him. "I stopped the truck and watched the funnel cloud. It was about 100 feet off the ground and I saw it go up and down for a while.It was moving toward Bradley Road and then suddenly it disappeared,"Snyder said.Snyder only saw one of the funnel clouds that passed through northeastern Ohio on Saturday.In Trumbull County,a tornado turned trees onto their sides.Some trees fell onto houses and cars. Other trees fell into telephone and electrical wires as they went down.Amanda Symcheck was having a party when the storm began."I knew something was wrong," she said."I saw the sky go green and pink（粉红色）.Then it sounded like a train rushing toward the house.I started crying and told everyone to go to the basement for protection."The tornado caused a lot of damage to cars and houses in the area. It will take a long time and much money to repair everything. There was also serious water damage from the thunderstorms.The heavy rains and high wind caused the power to go out in many homes.The storms caused serious flooding in areas near the river. More than four inches of rain fell in parts of Trumbull County.The river was so high that the water ran into streets and houses.Many streets had to be closed to cars and trucks because of the high water. This made it difficult for fire trucks,police cars,and other rescue vehicles to help people who were in trouble.Many people who live near the river had to leave their homes for their own safety.Some people reported five feet of water in their homes.Local and state officials opened emergency shelters for the people who were evacuated（撤走）.The Red Cross served meals to them."This was a really intense storm,"said Snyder."People were afraid.Mother Nature can be fierce.We were lucky this time.No one was killed."George Snyder was a firefighter.A:Right B:Wrong C:Not mentioned
考题
共用题干
Tornadoes- The Power of the NatureMother nature bestows so much on mankind so that we can survive the cruelty of the environment,though sometimes,she'd like to give us some kind of test.Tornadoes（龙卷风）and heavy thunderstorms rushed across the Great Lakes and into Trumbull County on Saturday evening. The storms were dramatic and dangerous.George Snyder was riding the fire truck down Route 88 when he first noticed that a funnel（漏斗状的）cloud was behind him. "I stopped the truck and watched the funnel cloud. It was about 100 feet off the ground and I saw it go up and down for a while.It was moving toward Bradley Road and then suddenly it disappeared,"Snyder said.Snyder only saw one of the funnel clouds that passed through northeastern Ohio on Saturday.In Trumbull County,a tornado turned trees onto their sides.Some trees fell onto houses and cars. Other trees fell into telephone and electrical wires as they went down.Amanda Symcheck was having a party when the storm began."I knew something was wrong," she said."I saw the sky go green and pink（粉红色）.Then it sounded like a train rushing toward the house.I started crying and told everyone to go to the basement for protection."The tornado caused a lot of damage to cars and houses in the area. It will take a long time and much money to repair everything. There was also serious water damage from the thunderstorms.The heavy rains and high wind caused the power to go out in many homes.The storms caused serious flooding in areas near the river. More than four inches of rain fell in parts of Trumbull County.The river was so high that the water ran into streets and houses.Many streets had to be closed to cars and trucks because of the high water. This made it difficult for fire trucks,police cars,and other rescue vehicles to help people who were in trouble.Many people who live near the river had to leave their homes for their own safety.Some people reported five feet of water in their homes.Local and state officials opened emergency shelters for the people who were evacuated（撤走）.The Red Cross served meals to them."This was a really intense storm,"said Snyder."People were afraid.Mother Nature can be fierce.We were lucky this time.No one was killed."There had not been such a severe storm in Trumbull County for a hundred years.A:Right B:Wrong C:Not mentioned
考题
共用题干
Tornadoes- The Power of the NatureMother nature bestows so much on mankind so that we can survive the cruelty of the environment,though sometimes,she'd like to give us some kind of test.Tornadoes（龙卷风）and heavy thunderstorms rushed across the Great Lakes and into Trumbull County on Saturday evening. The storms were dramatic and dangerous.George Snyder was riding the fire truck down Route 88 when he first noticed that a funnel（漏斗状的）cloud was behind him. "I stopped the truck and watched the funnel cloud. It was about 100 feet off the ground and I saw it go up and down for a while.It was moving toward Bradley Road and then suddenly it disappeared,"Snyder said.Snyder only saw one of the funnel clouds that passed through northeastern Ohio on Saturday.In Trumbull County,a tornado turned trees onto their sides.Some trees fell onto houses and cars. Other trees fell into telephone and electrical wires as they went down.Amanda Symcheck was having a party when the storm began."I knew something was wrong," she said."I saw the sky go green and pink（粉红色）.Then it sounded like a train rushing toward the house.I started crying and told everyone to go to the basement for protection."The tornado caused a lot of damage to cars and houses in the area. It will take a long time and much money to repair everything. There was also serious water damage from the thunderstorms.The heavy rains and high wind caused the power to go out in many homes.The storms caused serious flooding in areas near the river. More than four inches of rain fell in parts of Trumbull County.The river was so high that the water ran into streets and houses.Many streets had to be closed to cars and trucks because of the high water. This made it difficult for fire trucks,police cars,and other rescue vehicles to help people who were in trouble.Many people who live near the river had to leave their homes for their own safety.Some people reported five feet of water in their homes.Local and state officials opened emergency shelters for the people who were evacuated（撤走）.The Red Cross served meals to them."This was a really intense storm,"said Snyder."People were afraid.Mother Nature can be fierce.We were lucky this time.No one was killed."Power supply system was not damaged during the storm.A:Right B:Wrong C:Not mentioned
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共用题干
Tornadoes- The Power of the NatureMother nature bestows so much on mankind so that we can survive the cruelty of the environment,though sometimes,she'd like to give us some kind of test.Tornadoes（龙卷风）and heavy thunderstorms rushed across the Great Lakes and into Trumbull County on Saturday evening. The storms were dramatic and dangerous.George Snyder was riding the fire truck down Route 88 when he first noticed that a funnel（漏斗状的）cloud was behind him. "I stopped the truck and watched the funnel cloud. It was about 100 feet off the ground and I saw it go up and down for a while.It was moving toward Bradley Road and then suddenly it disappeared,"Snyder said.Snyder only saw one of the funnel clouds that passed through northeastern Ohio on Saturday.In Trumbull County,a tornado turned trees onto their sides.Some trees fell onto houses and cars. Other trees fell into telephone and electrical wires as they went down.Amanda Symcheck was having a party when the storm began."I knew something was wrong," she said."I saw the sky go green and pink（粉红色）.Then it sounded like a train rushing toward the house.I started crying and told everyone to go to the basement for protection."The tornado caused a lot of damage to cars and houses in the area. It will take a long time and much money to repair everything. There was also serious water damage from the thunderstorms.The heavy rains and high wind caused the power to go out in many homes.The storms caused serious flooding in areas near the river. More than four inches of rain fell in parts of Trumbull County.The river was so high that the water ran into streets and houses.Many streets had to be closed to cars and trucks because of the high water. This made it difficult for fire trucks,police cars,and other rescue vehicles to help people who were in trouble.Many people who live near the river had to leave their homes for their own safety.Some people reported five feet of water in their homes.Local and state officials opened emergency shelters for the people who were evacuated（撤走）.The Red Cross served meals to them."This was a really intense storm,"said Snyder."People were afraid.Mother Nature can be fierce.We were lucky this time.No one was killed."Rescue vehicles had a hard time getting to people.A:Right B:Wrong C:Not mentioned
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共用题干
Tornadoes- The Power of the NatureMother nature bestows so much on mankind so that we can survive the cruelty of the environment,though sometimes,she'd like to give us some kind of test.Tornadoes（龙卷风）and heavy thunderstorms rushed across the Great Lakes and into Trumbull County on Saturday evening. The storms were dramatic and dangerous.George Snyder was riding the fire truck down Route 88 when he first noticed that a funnel（漏斗状的）cloud was behind him. "I stopped the truck and watched the funnel cloud. It was about 100 feet off the ground and I saw it go up and down for a while.It was moving toward Bradley Road and then suddenly it disappeared,"Snyder said.Snyder only saw one of the funnel clouds that passed through northeastern Ohio on Saturday.In Trumbull County,a tornado turned trees onto their sides.Some trees fell onto houses and cars. Other trees fell into telephone and electrical wires as they went down.Amanda Symcheck was having a party when the storm began."I knew something was wrong," she said."I saw the sky go green and pink（粉红色）.Then it sounded like a train rushing toward the house.I started crying and told everyone to go to the basement for protection."The tornado caused a lot of damage to cars and houses in the area. It will take a long time and much money to repair everything. There was also serious water damage from the thunderstorms.The heavy rains and high wind caused the power to go out in many homes.The storms caused serious flooding in areas near the river. More than four inches of rain fell in parts of Trumbull County.The river was so high that the water ran into streets and houses.Many streets had to be closed to cars and trucks because of the high water. This made it difficult for fire trucks,police cars,and other rescue vehicles to help people who were in trouble.Many people who live near the river had to leave their homes for their own safety.Some people reported five feet of water in their homes.Local and state officials opened emergency shelters for the people who were evacuated（撤走）.The Red Cross served meals to them."This was a really intense storm,"said Snyder."People were afraid.Mother Nature can be fierce.We were lucky this time.No one was killed."Amanda Symcheck was having a party in the basement when the storm began?A:Right B:Wrong C:Not mentioned
考题
The flood has done_____to this area．A.damages
B.many damages
C.much damage
D.damaging
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