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单选题
A “dead front” switchboard is one （）.
A
without switches on it
B
with insulated switches and no exposed terminals
C
without circuit breakers
D
without safety hand nails nor rubber mats
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设数组data[m]作为循环队列SQ的存储空间,front为队头指针,rear为队尾指针,则执行出队操作后其头指针front值为()
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I like this house with a beautiful garden in front , but I don’t have enough money to buy__________.A. one B. it C. this D. that
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When things far away seem indistinct, one is probably ______.A. near-sightedB. far-sightedC. astigmaticD. suffering front cataracts
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English is a ( ) language and should not be taught as if it were a ( )one.
A、living/ dyingB、living/ deadC、alive/ dyingD、alive/ dead
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---Dead slow ahead! ----Dead slow ahead! _______________A.Engine dead slow ahead!B.Engine dead ahead slow!C.Engine slow dead ahead!D.I do it right now
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The control mode in which tile final control element is moved from one of two fixed positions to the other is known as______.A.dead band actionB.neutral zone actionC.rangeD.on-off action
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A head-on situation at night is one in which you see dead ahead a vessel showing ______.A.one sidelightB.one sidelight and a masthead lightC.one sidelight and two masthead lightsD.both sidelights of a vessel and her masthead light(s)
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The velocity of the apparent wind can be more than the true wind，and come from the same direction，if certain conditions are present．One condition is that the ______．A.Ship's speed must be less than the true wind velocityB.True wind must be from dead asternC.True wind velocity must be faster than the ship's speedD.True wind must be from dead ahead
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Approaching a anchorage in fog, you hear one short, one prolonged, and one short blast in that sequence on a ship’s whistle. This indicates ______.A.A vessel towedB.A vessel not under command and unable to maneuver.C.A vessel anchored giving warning of her position.D.A vessel stopped dead in the water.
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共用题干
第二篇Night of the Living AntsWhen an ant dies,other ants move the dead insect out of the nest.This behavior is interesting to scien-tists,who wonder how ants know for sure一and so soon一that another ant is dead.Dong-Hwan Choe,a scientist at the University of California,found that Argentine ants have a chemical on the outside of their bodies that signals to other ants,"I'm dead一take me away."But there's a twist to Choe's discovery. These ants behave a little bit like zombies（僵尸）.Choe says that the living ants一not just the dead ones一have this death chemicals. In other words,while an ant crawls around,perhaps in a picnic or home,it's telling other ants that it's dead.What keeps ants from hauling away the living dead? Choe found that Argentine ants have two additional chemicals on their bodies,and these tell nearby ants something like,"Wait一I'm not dead yet."So Choe's research turned up two sets of chemical signals in ants:one says,"I'm dead,"the other set says,"I'm not dead yet."Other scientists have tried to figure out how ants know when another ant is dead.If an ant is knockedunconscious,other ants leave it alone until it wakes up.That means ants know that unmoving ants can still be alive.Choe suspects that when an Argentine ant dies,the chemical that says"Wait一I'm not dead yet"quickly goes away. Once that chemical is gone,only the one that says"I'm dead"is left."It's because the dead ant no longer smells like a living ant that it gets carried to the graveyard（墓地）,not because its body releases new,unique chemicals after death,"said Choe.When other ants detect the"dead"chemical without the"not dead yet" chemical,they haul away the body. This was Choe's hypothesis（假设）.To test his hypothesis,Choe and his team put different chemicals on Argentine ant pupae（蛹）.When the scientists used the"I'm dead"chemical,other ants quickly hauled the treated pupae away.When the sci-entists used the"Wait一I'm not dead yet"chemical,other ants left the treated pupae alone.Choe believes this behavior shows that the" not dead yet" chemical overrides（优先于）the" dead" chemical when picked up by adult ants.And that when an ant dies,the"not dead yet"chemical fades away.Other nearby ants then de-tect the remaining"dead"chemical and remove the body from the nest.According to Choe's hypothesis,_______________.A:an ant still smells like a living one when it diesB:the"I am dead"chemical leaves the ant's body when it diesC:the"I am not dead yet"chemical is left when an ant diesD:the"I am not dead yet"chemical quickly goes away when it dies
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共用题干
第二篇Night of the Living AntsWhen an ant dies,other ants move the dead insect out of the nest.This behavior is interesting to scien-tists,who wonder how ants know for sure一and so soon一that another ant is dead.Dong-Hwan Choe,a scientist at the University of California,found that Argentine ants have a chemical on the outside of their bodies that signals to other ants,"I'm dead一take me away."But there's a twist to Choe's discovery. These ants behave a little bit like zombies（僵尸）.Choe says that the living ants一not just the dead ones一have this death chemicals. In other words,while an ant crawls around,perhaps in a picnic or home,it's telling other ants that it's dead.What keeps ants from hauling away the living dead? Choe found that Argentine ants have two additional chemicals on their bodies,and these tell nearby ants something like,"Wait一I'm not dead yet."So Choe's research turned up two sets of chemical signals in ants:one says,"I'm dead,"the other set says,"I'm not dead yet."Other scientists have tried to figure out how ants know when another ant is dead.If an ant is knockedunconscious,other ants leave it alone until it wakes up.That means ants know that unmoving ants can still be alive.Choe suspects that when an Argentine ant dies,the chemical that says"Wait一I'm not dead yet"quickly goes away. Once that chemical is gone,only the one that says"I'm dead"is left."It's because the dead ant no longer smells like a living ant that it gets carried to the graveyard（墓地）,not because its body releases new,unique chemicals after death,"said Choe.When other ants detect the"dead"chemical without the"not dead yet" chemical,they haul away the body. This was Choe's hypothesis（假设）.To test his hypothesis,Choe and his team put different chemicals on Argentine ant pupae（蛹）.When the scientists used the"I'm dead"chemical,other ants quickly hauled the treated pupae away.When the sci-entists used the"Wait一I'm not dead yet"chemical,other ants left the treated pupae alone.Choe believes this behavior shows that the" not dead yet" chemical overrides（优先于）the" dead" chemical when picked up by adult ants.And that when an ant dies,the"not dead yet"chemical fades away.Other nearby ants then de-tect the remaining"dead"chemical and remove the body from the nest.The passage"Night of the Living Ants"tells us about_______________.A:how an ant is moved out of the nest at nightB:what an ant does at nightC:how an ant finds its way in darknessD:what happens when an ant dies
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共用题干
第二篇Night of the Living AntsWhen an ant dies,other ants move the dead insect out of the nest.This behavior is interesting to scien-tists,who wonder how ants know for sure一and so soon一that another ant is dead.Dong-Hwan Choe,a scientist at the University of California,found that Argentine ants have a chemical on the outside of their bodies that signals to other ants,"I'm dead一take me away."But there's a twist to Choe's discovery. These ants behave a little bit like zombies（僵尸）.Choe says that the living ants一not just the dead ones一have this death chemicals. In other words,while an ant crawls around,perhaps in a picnic or home,it's telling other ants that it's dead.What keeps ants from hauling away the living dead? Choe found that Argentine ants have two additional chemicals on their bodies,and these tell nearby ants something like,"Wait一I'm not dead yet."So Choe's research turned up two sets of chemical signals in ants:one says,"I'm dead,"the other set says,"I'm not dead yet."Other scientists have tried to figure out how ants know when another ant is dead.If an ant is knockedunconscious,other ants leave it alone until it wakes up.That means ants know that unmoving ants can still be alive.Choe suspects that when an Argentine ant dies,the chemical that says"Wait一I'm not dead yet"quickly goes away. Once that chemical is gone,only the one that says"I'm dead"is left."It's because the dead ant no longer smells like a living ant that it gets carried to the graveyard（墓地）,not because its body releases new,unique chemicals after death,"said Choe.When other ants detect the"dead"chemical without the"not dead yet" chemical,they haul away the body. This was Choe's hypothesis（假设）.To test his hypothesis,Choe and his team put different chemicals on Argentine ant pupae（蛹）.When the scientists used the"I'm dead"chemical,other ants quickly hauled the treated pupae away.When the sci-entists used the"Wait一I'm not dead yet"chemical,other ants left the treated pupae alone.Choe believes this behavior shows that the" not dead yet" chemical overrides（优先于）the" dead" chemical when picked up by adult ants.And that when an ant dies,the"not dead yet"chemical fades away.Other nearby ants then de-tect the remaining"dead"chemical and remove the body from the nest.Which of the following statements is NOT true of ants?A:Ants know very soon that?another ant is dead.B:When an ant is dead,others move its body out of the nest.C:If an ant is unconscious,it is moved out of the nest.D:Living ants have the"I'm dead"chemical on their bodies.
考题
---Dead slow ahead! ----Dead slow ahead! （）A、Engine dead slow ahead!B、Engine dead ahead slow!C、Engine slow dead ahead!D、I do it right now
考题
What is the FIRST step in diagnosing a completely dead computer that was working fine the day before？（）A、remove all peripherals and reinstall them one at a timeB、replace the CMOS batteryC、check the AC power cord and verify the power sourceD、back up the entire hard drive
考题
单选题（）is not installed on the emergency switchboard.A
AmmeterB
VoltmeterC
WattmeterD
Synchroscope
考题
单选题According to the passage, which exits should an airline passenger locate before takeoff?A
The front one and the back one.B
The two closest to the pilot seat.C
The ones that can be found in the dark.D
The ones with counted rows of seats between them.
考题
单选题An occluded front is usually caused by a（）.A
cold front becoming stationaryB
warm front becoming stationaryC
cold front overtaking a warm frontD
warm front dissipating
考题
单选题A vessel is approaching from dead ahead． Both of her sidelights are visible and her range lights are in line. Which of the following could you do first?（）.A
Sound one blast of the whistleB
Alter course to starboardC
Construct a radar plotD
Sound the danger signal
考题
单选题A head-on situation at night is one in which you see dead ahead a vessel showing（）.A
one sidelightB
one sidelight and a masthead lightC
one sidelight and two masthead lightsD
both sidelights of a vessel and her masthead light(s)
考题
单选题Switchboards may be of the dead-front type in which all live parts are installed behind （） and only the operation handles and instruments are on the front.A
the capstanB
the collectorC
the panelsD
the surface
考题
单选题What happened to one of the four birds?A
It was dead on the way to London.B
It flew away from the cage.C
It was stolen by someone.
考题
单选题Approaching an anchorage in fog，you hear one short，one prolonged，and one short blast in that sequence on a ship’s whistle． This indicates（）.A
A vessel towedB
A vessel not under command and unable to maneuverC
A vessel anchored giving warning of her positionD
A vessel stopped dead in the water
考题
单选题The apparent wind’s speed can be zero only when two conditions are present. One condition is that the true wind（）.A
must be from dead aheadB
speed must be zeroC
must be from dead asternD
must be on the beam
考题
单选题A head-on situation at night is one in which you see（）.A
one sidelight of a vessel ahead of youB
one sidelight and a masthead light of a vessel ahead of youC
one sidelight，a masthead light，and a range light of a vessel ahead of youD
both sidelights of a vessel dead ahead of you
考题
单选题The switchboards for a-csystems differ from the d-cswitch gear in that the open type panels are generally（） and the dead-front switch gear is the common rule.A
permissiblyB
permissibleC
no permissibleD
not permissible
考题
单选题Paul suggested that they meet in the front of the school gate at one o'clock Friday afternoon.A
they meetB
in the frontC
atD
Friday
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