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问题 单项选择题

（）主要用于大长度电缆线路各相电缆金属护套的交叉换位互联接地，以减小电缆金属护套的感应电压。

A.直线接头；

B.绝缘接头；

C.过渡接头；

D.塞止接头。

答案

参考答案：B

单项选择题

You are a project manager of a small construction project. Your project was budgeted for US $72,000 over a six week period. As of today, you’ve spent US $22,000 of your budget to complete work that you originality espected would cost US $24,000. According to your schedule, you should have spent US $30,000 by this point. Based on these circumstances, you project could be BEST described as ______ .

A) under budget
B) over budget
C) on budget
D) need more info
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选择题

用0.01mol·L-1 H2SO4滴定0.01mol·L-1NaOH溶液，中和后加水至100mL。若滴定时终点判断有误差：

①多加了1滴H2SO4；②少加了1滴H2SO4（设1滴为0.05mL）。则①和②C（H+）之比的值为[ ]

A．10

B．50

C．5×103

D．104

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