单项选择题

过滤电场的形成是由于高浓度溶液向低浓度溶液的扩散。（） A. 对 B. 错

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单项选择题

Translate the following sentence into English.
“利率的变动不是影响债券市价的惟一因素。” A.
Changes in the current level of interest rates are not the only factor influencing the market prices of bonds. B.
Changes in the uncurrent level of interest rates are not the only factor influencing the market prices of bonds. C.
Changes in the current level of interest rates are not the only factor influencing the market prices of bonds payable. D.
None of the above.

DDT属于第二代农药，是第一个人类合成的农药，属于有机磷化合物。

答案：错误