题目内容

John has already finished one of the two projects.

A. 对
B. 错

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The woman thinks stress is bad for our health.

A. 对
B. 错

The woman suggests John should make more friends.

A. 对
B. 错

John will probably take more exercise later.

A. 对
B. 错

继电保护在技术上一般应满足四个基本要求，即选择性、速动性、() 和可靠性。

A. 正确性:
B. 合理性:
C. 灵敏性。