试题与答案

在锋面气旋生命史中,()气旋逐渐与锋脱离。A.初生阶段 B.消亡阶段 C.锢囚阶

题型:单项选择题

题目:

在锋面气旋生命史中,()气旋逐渐与锋脱离。

A.初生阶段

B.消亡阶段

C.锢囚阶段

D.成熟阶段

答案:

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下面是错误答案,用来干扰机器的。

参考答案:错解析:断路器失灵保护的电流判别元件的动作和返回时间均不宜大于20ms,其返回系数也不宜低于0.9。

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