题目内容
（请给出正确答案）
A. stow rainwater; these 4 spaces do not take up valuable space
B. act as stabilizers by filling with sea water as soon as the raft is inflated and upright
C. hold the freshwater required by regulation to be provided in the raft when packed
D. None of the above
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更多“The water pockets located on the underside of inflatable liferafts（）.”相关的问题
A．stow rainwater; these 4 spaces do not take up valuable space
B．act as stabilizers by filling with sea water as soon as the raft is inflated and upright
C．hold the freshwater required by regulation to be provided in the raft when packed
D．None of the above
A．causes colloid suspension in the cooling water
B．reduces the capability of the lubrication system
C．can form pockets which block the flow of coolant through the system
D．leads to the scuffing of cylinder wall
A.Causes colloid suspension in the cooling water
B.Reduces the capability of the lubrication system
C.Can form pockets which block the flow of coolant through the system
D.Leads to the scuffing of cylinder walls
A.Maintains a constant head on the system
B.Reduces the likelihood of air or steam pockets formation
C.Provides a low pressure point for the addition of makeup cooling water
D.All of the above
A.Hydraulic stress and distortion will develop
B.Hot spots will develop
C.Fuel oil viscosity will increased
D.An increase in trapped deposits of scale and dirt
______ we need air and water, so we need criticism and self-criticism.
A．Even though
B．So long as
C．Just as
D．Now that
The phrase VESSEL IN BALLAST usually means________.
A.the ship is fully loaded
B.the ship loaded with water
C.a ship with cargo
D.a ship with no cargo
It can be inferred from the last paragraph that
A．dishonesty is generally followed by impunity.
B．NATO's assertion can hold water in terms of Kosovo.
C．America tailed to win approval from UN due lo Russia's decline.
D．NATO's conclusion contradicts UN basic principles.
听力原文： Aid workers in Mozambique say they' re increasingly confident that they are coming to terms with the humanitarian crisis that follows the devastating floods. Helicopters and planes have been working flat-out to get supplies through to areas of need. The World Health Organization has warned that malaria has risen sharply after the flooding. This report from Jim Fish in Maputong: "The skies over Mozambique have never been this busy. Relays of helicopters and aircraft crisscross to and fro ferrying food and supplies to the stricken areas. A fleet of more than 50 aircraft are now operating, averaging 200 flights per day. At one forward supply depot in the town of Pamela, helicopters were arriving every few minutes, ferrying sacks of maize, and rice and beans out to where the flood survivors are congregated. But there are still pockets of people who have not received food or fresh water for over a week."
Aid workers in Mozambique say they are confident that______.
A．they are coming to terms with the humanitarian crisis
B．they can get more help from the outside world
C．they can get supplies through to the areas of need
D．they can help themselves
SECTION B PASSAGES
Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.
听力原文： We all scream for water when thirsty. (15[A]) But do you know in very hot, dry weather plants also make faint sounds— as if they're crying out for help？
You see, in a plant's stem there're hundreds of "water pipes" that bring water and minerals from the soil all the way up to the leaves. As the ground turns dry, it becomes harder and harder for the plants to do this.
In severe droughts, plants have to fight to pull out any water available. Scientist Robert Winter has found out that when it is really bad their water pipes snap from the tension like rubber bands. When that happens, the whole plant vibrates a little. The snapping pipes make noises 10,000 times quieter than a whisper.
Robert knows that healthy, well-watered plants are quiet. (16[D]) He also knows that many insects prefer attacking dry plants rather than healthy plants. How do the insects know which are healthy plants and which are not？ Robert thinks that the insects may listen for the plants that cry. And then they may buzz in to kill.
To test his theory, Robert is using a device that can imitate plant cries. He attaches it to a quiet, healthy plant so the plant sounds thirsty. Then he watches insects lo see if they attack more often than usual.
If he is right, scientists could use the insects' ability against them. (17[D]) They could build traps that imitate crying plants. So when the insects buzz in to eat, they won't buzz out.
What do plants do when they are thirsty？
A．They give out faint cries.
B．They make noises to drive away insects.
C．They extend their water pipes.
D．They become elastic like rubber bands.
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