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问题 多项选择题

与癌变有关的寄生虫有（）

A.肺吸虫

B.丝虫

C.华支睾吸虫

D.肝包虫

E.血吸虫

答案

参考答案：C, E

解析：华枝睾吸虫与原发性肝癌特别是胆管细胞癌有关，血吸虫与结肠癌有关。

单项选择题

十一五时期，要使得资源利用效率显著提高。其中单位工业增加值用水量降低 ( )。

A．20%

B．30%

C．40%

D．50%
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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. takeB. support C. perform D. fetch
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