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问题 单项选择题

粪便呈白色淘米水样，量多，内含黏液片块，脓细胞少见，应注意查找

A．巨噬细胞

B．真菌

C．癌细胞

D．阿米巴滋养体

E．呈鱼群穿梭样运动活泼的弧菌

答案

参考答案：E

解析： 阿米巴痢疾的大便性状为暗红色果酱样，红细胞多；巨噬细胞最常见于急性菌痢；霍乱弧菌感染大便性状为白色淘米水样。

单项选择题

甲状腺功能减退症的最常见原因（）

A.原发性甲状腺功能减退症

B.手术

C.垂体肿瘤

D.放射

E.下丘脑病变
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填空题

Press Photographers


Good press photographers must have an "eye" for news, (26) journalists must have a "nose" for a good story. They must be able to interpret a story and decide rapidly how they can take (27) of the best opportunities to take pictures. The most difficult part of a press photographer’s job is that he or she has to be able to (28) a complicated situation with just one photograph. They rarely have second (29) and must be able to take the required (30) very quickly. Indeed, speed is essential — if the photographs are not (31) for the printing deadline, they are very unlikely to be of any (32) .
Most press photographers begin (33) with a local newspaper. There, the (34) is mostly for material of regional interest. Photographers may be expected to photograph a lot of unexciting events but to (35) the enthusiasm to put "something special" into every picture.
There is (36) competition among those who want to move from local to national newspapers. Here, the work is much more centered on news. The photographer must work (37) greater pressure and (38) more responsibility. Only (39) reliable, talented and resourceful photographers (40) this difficult move. The work is tough and can be (41) . On an overseas assignment, photographers may have to (42) unfamiliar food and accommodation, physical and mental stress, and (43) difficulty in transporting the pictures from an isolated area to get them to the newspaper (44) They also have to (45) the competition from other publications.

A. demand B. taskC. obligation D. duty
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