使用电流法判断泵的工作状态，电流周期性波动，出液流不稳定，往

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问题单项选择题

使用电流法判断泵的工作状态，电流周期性波动，出液流不稳定，往往是（）、供液不足及防冲距没提到位。

A.油管结腊

B.油管严重漏失

C.原油含气的影响

D.原油粘度大

答案

参考答案：C

单项选择题

城市规划中，对地价影响相对更大的因素是( )。

A．地形、朝向、地质条件

B．用途、容积率、建筑密度

C．绿化、环境质量

D．面积、形状、土地使用年限

单项选择题

Which of the following is least likely the reason that floating rate bonds may trade at prices different from their par values（）

A. Resetting interest rates makes floating rate bonds more susceptible to the price risk that results from changing interest rates.

B. A time lag exists between the rate change in the market and the time when the coupon rate is reset.

C. The fixed quoted margin on the floating rate security may differ from the margin required by the market.