题目内容

The boy studied the signs for over an hour, but sill could not ____ them, so he turned to his teacher for help.

A. count on
B. make sense of
C. reserve for
D. shield from

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We will continue to care for those ____ and work to establish a society that is generous and prosperous.

A. call on
B. sum up
C. lelate to
D. in need

He is a person that you can always ____ when you need help.

A. call on
B. sum up
C. count on
D. relate to

16.运输液化气，石油等的槽车在行驶时，在槽车底部应采用金属链条或导电橡胶使之与大地接触，其目的是()。

A. 中和槽车行驶中产生的静电荷
B. 泄漏槽车行驶中产生的静电荷
C. 使槽车与大地等电位

17.静电防护的措施比较多，下面常用又行之有效的可消除设备外壳静电的方法是()。

A. 接地
B. 接零
C. 串接