题目内容

影响接收机信号特性的三种主要现象有____、____和____。

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寻呼由网络向________状态下的UE发起?

一个4*4MIMO链路仅仅在下行链路中就需要____个平行的衰落信道。

压水堆15×15排列的燃料组件有()根控制棒组件。

A. 12
B. 16
C. 20
D. 24

Which features of a centrifugal pump reduce the need for renewing worn impellers and pump

A. Close radial clearance between impeller hub and casing
B. Low rotational speed of impeller
C. Removable end plate
D. Replaceable impeller and casing wearing rings

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