2013年英语四级考试每日一练(5月24日)
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完型
1. An adult giraffe's head is about six feet above its heart. This means that to 67 enough blood up to the brain the circulatory 68 must be strong enough to keep the blood at very high pressure.
Biologists have known for some time that giraffes solve this problem by having 69 high blood pressure, about 70 that of human beings. But an international team of biologists began to 71 about this. If giraffes have such high blood pressure, they should have a 72 problem with swelling in their legs and feet. Why don't giraffes
have swollen feet?
Giraffes should have 73 problem, too. Every time they bend heads __7_4__ to drink, the blood should 75 to their heads and have a hard time 76 back up (when the head is down) to the heart. How come giraffes don't black out when they drink?
The answer to the 77 feet problem, the researchers found, is that giraffes have 78 the researchers call a "natural anti-gravity suit". It 79 out that the skin
and other 80 in their legs and feet are 81 stiffer and tougher than those of other 82 . 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 83 the giraffe bends down to drink? The researchers found that the giraffe's jugular vein, which 84 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 85 drinking water. By squeezing the valved jugular vein, they 86 blood moving back to the heart even while the animal is drinking.阅读以上文章，回答68-30题
请在（67）处填上答案。
A． bring
B． produce
C． transfer
D． pump
2. 请在(74)处填上答案.
A．reuse
B．reread
C．rewrite
D．recite
3.
A．American Indians and corn.
B．The planting techniques of corn.
C．The joy of harvest.
D．Various ways to prepare corn.
4. 根据材料回答{TSE}题：
__________
5. 请在(79)处填上答案.
A．then
B．as
C．beyond
D．than
翻译题
6. Whenever Olive is misunderstood by her friends，she would like to write to them for clarification，______ (而不是面对面交流)．
7. The gid decided to drop out of the school__________________ (尽管她父母强烈反对)．
8. Children love soft drinks，__________(因为它味道很甜而且有多种口味)．
9. 选词填空试题正在更新中，答案解析已经更新
选词填空答案
47 C) require 48 G) painful 49 J) especially 50 K) enormous 51 H) mission
52 L) enhance 53 N) daily 54 F) performance 55 M) emotional 56 O) closer
写作
10.
1．能源短缺问题已经非常严重；
2．可以采取节能措施解决能源短缺问题：
3．你的看法。
1. An adult giraffe's head is about six feet above its heart. This means that to 67 enough blood up to the brain the circulatory 68 must be strong enough to keep the blood at very high pressure.
Biologists have known for some time that giraffes solve this problem by having 69 high blood pressure, about 70 that of human beings. But an international team of biologists began to 71 about this. If giraffes have such high blood pressure, they should have a 72 problem with swelling in their legs and feet. Why don't giraffes
have swollen feet?
Giraffes should have 73 problem, too. Every time they bend heads __7_4__ to drink, the blood should 75 to their heads and have a hard time 76 back up (when the head is down) to the heart. How come giraffes don't black out when they drink?
The answer to the 77 feet problem, the researchers found, is that giraffes have 78 the researchers call a "natural anti-gravity suit". It 79 out that the skin
and other 80 in their legs and feet are 81 stiffer and tougher than those of other 82 . 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 83 the giraffe bends down to drink? The researchers found that the giraffe's jugular vein, which 84 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 85 drinking water. By squeezing the valved jugular vein, they 86 blood moving back to the heart even while the animal is drinking.阅读以上文章，回答68-30题
请在（67）处填上答案。
A． bring
B． produce
C． transfer
D． pump
2. 请在(74)处填上答案.
A．reuse
B．reread
C．rewrite
D．recite
3.
A．American Indians and corn.
B．The planting techniques of corn.
C．The joy of harvest.
D．Various ways to prepare corn.
4. 根据材料回答{TSE}题：
__________
5. 请在(79)处填上答案.
A．then
B．as
C．beyond
D．than
翻译题
6. Whenever Olive is misunderstood by her friends，she would like to write to them for clarification，______ (而不是面对面交流)．
7. The gid decided to drop out of the school__________________ (尽管她父母强烈反对)．
8. Children love soft drinks，__________(因为它味道很甜而且有多种口味)．
9. 选词填空试题正在更新中，答案解析已经更新
选词填空答案
47 C) require 48 G) painful 49 J) especially 50 K) enormous 51 H) mission
52 L) enhance 53 N) daily 54 F) performance 55 M) emotional 56 O) closer
写作
10.
1．能源短缺问题已经非常严重；
2．可以采取节能措施解决能源短缺问题：
3．你的看法。
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