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问题 单项选择题

大量咯血常见于（）

A.肺栓塞

B.白血病

C.流行性出血热

D.支气管扩张症

E.支气管肺癌

答案

参考答案：D

解析：大量咯血常见于空洞型肺结核、支气管扩张症和肺脓肿。

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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．many

B．little

C．large

D．small
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单项选择题

制造某种产品需要四道工序，每道工序可选用多种方法。下图列出了制造这种产品各道工序可选用的不同方法：从节点1 开始，连续经过4 条线段（表示4 道工序所选用的方法），组成一条线路，直到节点12 结束。每条线段上标记的数字表示利用相应方法每件产品可以获得的利润（元）。企业为了获取最大利润，需要找出从节点1 到节点12 的一条线路，使其对应的各道工序的利润之和达到最大。利用运筹方法计算后可知，制造每件产品可以获得的最大利润是 （） 元。

 

A．28

B．31

C．33

D．34
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