没有任何补偿的电流互感器，其误差的绝对值随着二次负荷的阻抗值_爱下问搜题

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问题判断题

没有任何补偿的电流互感器，其误差的绝对值随着二次负荷的阻抗值减小而减小.但比值差减小得多，而相位差减小得少。

答案

参考答案：对

单项选择题

男性患者，45岁，患有慢性肾功能不全，每日尿量少于500ml，大剂量使用呋塞米利尿后，尿量恢复到2000ml左右，但长期反复用药后出现听觉障碍，其原因是（）。

A.血Na⁺、K⁺、Cl^﹣过低

B.药物蓄积直接毒害耳蜗毛细胞

C.脱水引起螺旋器血供不足

D.耳蜗外淋巴中Na⁺浓度降低

E.耳蜗内淋巴中K⁺浓度降低

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. launch B. beatC. affect D. welcome