地下管线阴极保护系统测试桩电位范围为（）。A.-0.75V～-1.5V B.-0.8_爱下问搜题

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问题单项选择题

地下管线阴极保护系统测试桩电位范围为（）。

A.-0.75V～-1.5V

B.-0.85V～-1.5V

C.-0.85V～-1.45V

D.-0.85V～-2.0V

答案

参考答案：B

选择题

Lian Zhan with his visitors ______ from Taiwan _____ paying his first visit to the mainland of China. [ ]

A. who come; is

B. which come; is

C. which is; are

D. that are; are

单项选择题

一般而言，金融期权的基础资产（）金融期货的基础资产。

A．多于

B．少于

C．等于

D．不是