题目内容
（请给出正确答案）
A．In the morning.
B．At noon.
C．In the afternoon.
D．At night.
如果结果不匹配，请 联系老师 获取答案
更多“When do high head power plants…”相关的问题
The second floor window is usually not very high from the ground. An average person, hanging by the fingertips will have a drop of about six feet to the ground. It is about the height of an average man. Of course, it is safer to jump a short way than to stay in a burning building.
Windows are also useful when you are waiting for help, be sure to keep the door closed before opening the window. Otherwise, smoke and fire may be drawn into the room. Keep your head low at the window to be sure you get fresh air rather than smoke that may have leaked(渗入) into the room.
On a second or a third floor, the best windows for escape are those which open on a roof. From the roof a person can drop to the ground more safely. Dropping onto cement(水泥地) might end in injury. Bushes and grass can help to break a fall.
Which of the following should not be used when trying to escape a fire？
A．windows.
B．elevators.
C．fire escapes.
D．stairways.
When the author says robots are still pretty dumb, he means______.
A．robots have not yet possessed sense of touch
B．robots still cannot read
C．there are still many things robots cannot do
D．humans are no match for robots
Biologists have known for some time that giraffes solve this problem by having 【C3】______ high blood pressure, about 【C4】______ that of human beings. But an international team of biologists began to 【C5】______ about this. If giraffes have such high blood pressure, they should have a 【C6】______ problem with swelling in their legs and feet. Why don't giraffes have swollen feet？
Giraffes should have 【C7】______ problem, too. Every time they bend heads 【C8】______ to drink, the blood should 【C9】______ to their heads and have a hard time 【C10】______ back up (when the head is down) to the heart. How come giraffes don't black out when they drink？
The answer to the 【C11】______ feet problem, the researchers found, is that giraffes have 【C12】______ the researchers call a "natural anti-gravity suit". It 【C13】______ out that the skin and other 【C14】______ in their legs and feet are 【C15】______ stiffer and tougher than those of other 【C16】______ . As a result, the blood vessels in the leg cannot swell.
Therefore, the blood has nowhere to go but back to the heart. What about blood rushing to the head 【C17】______ the giraffe bends down to drink？ The researchers found that the giraffe's jugular vein, which 【C18】______ blood from the head back to the heart, has lots of one-way valves in it. In the giraffe's neck, there are lots of muscles that flex and relax repeatedly as the animal moves its head and sucks 【C19】______ drinking water. By squeezing the valved jugular vein, they 【C20】______ blood moving back to the heart even while the animal is drinking.
【C1】
A．bring
B．produce
C．transfer
D．pump
Why do most parents feel embarrassed when their children graduate from high school？
A．Because they can"t afford their children"s college tuition.
B．Because they can"t offer their children emotional support.
C．Because they can"t look after their children.
D．Because they can"t give their children birthday gifts.
听力原文：M: How do you manage to feed your family when food prices are so high？
W: We have a garden and some fruit trees, and we raise some fish in the small pond.
What does the woman's family do about the high sort of food？
A．They produce part of their own food.
B．They sell their own produce.
C．They feed their family on cheap food.
D．They buy food from farmers.
Above all, the newly rich Europeans go on holiday. In 1985, 56% of them went away at least once. As anyone who has tried to spread a towel on a Mediterranean beach in high summer can confirm, 34% of them took their main holidays in August and another 28% in July. For peace(if not sun), try February or November, when only 1% of Europeans take their main holiday. One European in three took holidays abroad. These, not surprisingly, are mostly northerners.
Half of Europe's holidaymakers head for the seaside. But in Holland marginally more people prefer a holiday in the countryside to a week on the beach. So there are some differences left.
We know from the first paragraph that north Europeans spend their spare time ______.
A．eating out
B．watching TV
C．visiting friends
D．fishing
Professor Bill had begun taking ______ research work when he was in high school.
A．to do
B．doing
C．to doing
D．having done
？Write a memo to your secretary：
？telling her who you are going to see and when
？asking her to book flight tickets and accommodation
？telling her what work you would like her to do in your absence．
？Write 40－45 Words．
听力原文：M: How do you manage to feed your family when the food prices are so high？
W: We have a garden and some fruit trees, and we raise some fish in the small pond.
Q: What does the woman's family do about the high cost of food？
(19)
A．They produce part of their own food.
B．They sell their own produce.
C．They feed their family on cheap food.
D．They buy food from farmers.
Parents are concerned about these figures. They are also concerned about the lack of quality in television programs for children. The degree of violence in many of these shows also worries them. Even if it is unreal--a cartoon cat beating up a cartoon mouse with a baseball bat--this violence may have a negative effect on the young minds exposed to it. Studies indicate that, when children are exposed to violence, they may become aggressive or insecure.
Parents are also concerned about the commercials that their children see on television. Many parents would like to see fewer commercials during programs for children. And some parents feel that these shows should not have any commercials at all because young minds are not mature enough to deal with the claims made by advertisers.
Educational television has no commercials and has programs for children that many parents approve of. The most famous of these is "Sesame Street", which tries to give preschool children a head start in learning the alphabet and numbers. It also tries to teach children useful things about the world in which they live.
Even though most parents and educators give "Sesame Street" and shows like it high marks for quality, some critics argue that all television, whether educational or not, is harmful to children. These critics feel that the habit of watching hours of television every day turns children into bored and passive consumers of their world rather than encouraging them to become active explorers of it.
We still do not know enough about the effects of watching television to be able to say whether or not it is good for children. Until we do, perhaps it would be wise to put a warning on television sets such as the one on cigarette packages: "Caution: Watching Too Much Television May Be Harmful to Your Child's Developing Mind."
We can infer from the text that ______.
A．children may imitate what they have seen on television
B．a cartoon program is not harmful if it is not real
C．parents are strongly opposed to children watching TV
D．the quality of children's programs is not the parents' main concern
