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问题 单项选择题

对于TWTA功率放大器，输入总功率相等情况下，多载波工作时总的输出功率比单载波工作的输出功率要（），因为TWTA是一个（）放大器。

A.大；非线性

B.小；线性

C.大；线性

D.小；非线性

答案

参考答案：D

单项选择题

责任保险是以（）为保险标的的一种保险。

A.投保人存放在固定地点的财产和物资

B.城乡居民的有形财产

C.被保险人对第三者依法应负的赔偿责任

D.各种运输工具运输过程中的货物
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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. extreme B. plentiful C. far D. grand
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