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We can conclude that ______.
A. the situation was nothing to be concerned about
B. Soufriere is still an active volcano
C. crater lakes are easy to hike to
D. Soufriere is a dead volcano
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更多 “ We can conclude that ______.A. the situation was nothing to be concerned aboutB. Soufriere is still an active volcanoC. crater lakes are easy to hike toD. Soufriere is a dead volcano ” 相关考题
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Passage ThreeA group of scientists rowing toward the center of a lake saw something shocking. They turned back as fast as they could. What had they seen.? The lake was boiling!The group was investigating a crater lake in the mountains of St. Vincent. A crater lake is the mouth of a volcano that has been dormant for some time and has filled with water.This particular crater was the tip of a volcano called Soufriere, which erupted last in 1902. Since that time, it had not shown any signs of action. But in the fall of 1971, mountain climbers who had hiked near the lake returned to the lowlands with strange stories. They said the water had turned yellow and was giving off a smell like burnt eggs. A seething fog was rising from the lake's surface.Local scientists rushed to Soufriere to see if this might be the beginning of a new volcanic explosion. They found a huge black mass in the middle of the water. It was a great blob 1,000 feet long and 300 feet wide. Lava had pushed up through the bottom of the lake and formed a new island.The investigators wanted to make sure that the volcano was safe, and that the lava would not over- flow into the surrounding countryside. But they could never reach the island to study it, because the lava was so hot that the water around it bubbled and boiled.44. This passage is about ______.A. mountain climbingB. a boiling lakeC. a new volcanic islandD. a mysterious blob
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共用题干
The Exploding Lakes of CameroonWhat comes to mind when you think of a lake?You probably imagine a pretty scene with blue water, birds,and fish.For the people in the northwestern Cameroon,however,the image is very different.For them, lakes may mean terrible disasters.In 1984,poisonous gases exploded out of Lake Monoun and came down into the nearby villages,killing thirty-seven people.Two years later,Lake Nyos erupted.A cloud of gases rolled down the hills and into the valleys and killed 1,700 people.Lake Nyos and Lake Monoun are crater（火山口）lakes.They were formed when water collected in the craters of old volcanoes.The volcanoes under Lake Nyos and Lake Monoun are not active anymore.However, poisonous gases from the center of the earth continue to flow up through cracks in the bottom of the lake.This is normal in a crater lake.In most crater lakes,these gases are released often because the water"turns over" regularly.That is,the water from the bottom of the lake rises and mixes with the water at the top,allowing the gases to escape slowly.However,in Lakes Nyos and Monoun,there is no regular turning over.No one knows the reason for this fact,but as a result,these lakes have more gases trapped at the bottom than other crater lakes.In fact, scientists who have studied Lakes Nyos and Monoun have found 16,000 times more gases.When a strong wind,cool weather,a storm,or a landslide（滑坡）causes the water to turn over suddenly,the gases escape in a violent explosion.In the past,no one knew when the gases might explode,so there was no way for the villagers to escape disaster.Now scientists from the United States,France,and Cameroon have found a way to reduce the gas pressure at the bottom of Lake Nyos.They stood a 672-foot plastic pipe in the middle of the lake,with one end of the pipe near the bottom and the other end in the air.Near the top of the pipe,the team put several holes that could be opened or closed by a computer.Now,when the gas pressure gets too high,the holes are opened and some of the gas-filled water shoots up through the pipe into the air like a fountain.With less pressure,a disastrous explosion is much less likely.However,the scientists are not sure that one pipe will be enough to prevent explosions.They hope to put in others soon and they plan to install a similar pipe and a computer system at Lake Monoun as well.To protect people nearby until all of the pipes are in place,the scientists have installed early warning systems at both lakes.If the gas pressure rises to a dangerous level,computers will set off loud sirens（警 报）and bright lights to warn the people in the villages.In that way,they will have time to escape from the dangerous gases.What do we learn from the last paragraph?A:Scientists are planning to install pipes in all crater lakes.B:Scientists still do not know how to prevent gas explosions.C:Explosion disasters could be avoided in the future.D:Warning systems have been set up in the villages nearby.
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--There is nothing__tomorrow afternoon,is there?
--No．We can have a game of table tennis.A.on
B.in
C.out
D.up
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From the article we can conclude that deadly night-shade is probably a kind of plant that is_______.A.colorful
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单选题We can conclude that the main character “She” is a _____.A
modelB
teacherC
singerD
banker
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单选题We can conclude from the last paragraph that______.A
trade winds are harmful to the low clouds.B
deep clouds are helpful to cool the earth.C
global warming can result in more low clouds.D
global warming can destroy the form of atmosphere.
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单选题We’ve got two TV sets, but we still can’t watch anything because ______ works properlyA
eachB
eitherC
neitherD
every
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单选题We can conclude from the passage that “binge drinking” means ______.A
a period of excessive indulgence in drinkingB
group drinking in the streetC
drinking for love affairD
mixed strong alcohol drinking
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单选题We can conclude from the passage that the author’s attitude towards Brazil is ______.A
with great respectB
neutral and understandingC
favorable with a bit contemptD
critical
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单选题From the passage, we can conclude that ______.A
weekly newspapers and other weekly news magazines are for busy peopleB
daily newspapers are for people in general onlyC
news can be used for educational purposesD
news services compete for readers
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单选题We’ve got two TV sets, but we still can’t watch anything because _____ works properly.A
eachB
eitherC
neitherD
every
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单选题From the passage we can conclude that _____.A
doctors remain doubtful of the effectiveness of the cureB
many ALD patients still refuse to use the oilC
various cures have been found for ALDD
the oil really works as a cure for ALD
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单选题We can safely conclude that ______.A
people in the 19th century were eager to eat sugarB
if shipwrecked sailors had drunk fresh water, things would have been even worseC
one or more scientists have been hired to cheat in regard to sugarD
scientists can do nothing without the money subsidized secretly
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