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问题 单项选择题

室内荧光灯的连续照射对患心脏病的仓鼠的健康有益。一群暴露在荧光灯连续照射下的仓鼠平均寿命比别一群同种但生活在黑墙中的仓鼠长2.5%。 下列哪一项问题是进行上述实验的最被动因（）

A．医院的光照疗法能被证明对病人的恢复有促进作用吗？

B．生活灯光下的仓鼠与生活在黑暗中的仓鼠哪一种更长寿？

C．仓鼠患的是什么病？

D．是否有此仓鼠需要一段时间的阴暗？

答案

参考答案：A

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Part 4


Questions 26-45


·Read the following passage and decide which answer best fits each space.
·Forquestions26-45, markoneletterA, B, C or D on the Answer Sheet.
Both (26) and zoology are parts of a more general field of science, biology. The two are studies of (27) things, which share certain characteristics, (28) they are plants or animals. Botany deals with plants, whose organisms that can (29) their own food by the use of sunlight. Zoology on (30) hand, deals with animals, those organisms that cannot manufacture their own food and are thus dependent (31) plants for their food.
(32) plants and animals share many abilities, the extent (33) which plants can exercise some of those abilities is (34) . For example, both plants and animals need food, water, and warmth for growth, (35) plants can move to (36) those needs only by the slow extraction of their leaves and roots, while animals can move relatively (37) distances in relatively little time. When an animal is hurt with needle, the animal will (38) the part of the body (39) . This ability to draw back (40) pain or irritation, called irritability, is found only to a very limited extent in plants.
If plants (41) the same (42) as animals, animals would have had a more difficult time finding food. If animals were as limited as plants, they might (43) a means of manufacturing their own food, as plants do now. The world would be a very different place (44) it is if the characteristics of plants and animals were (45)

A．have

B．would have

C．will have

D．had
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单项选择题

铁路运输工作以（）为一个工作日。

A.当日0：00至次日0：00

B.当日18：00至次日18：00

C.当日6：00至次日6：00

D.当日6：00至当日18：00（当日18：00至次日6：00）
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