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【单选题】
在碾压滚筒表面设有交错排列的截头圆锥体，并且适用于黏性土的压实机械是( )。A.
振动碾
B.
夯击
C.
碾
D.
气胎碾
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反馈参考答案：
举一反三
【单选题】由集成运放A1、A2等元器件组成的反馈放大电路如图所示。设A1、A2均为理想运放。电阻R 2 阻值增加,则级间负反馈的反馈深度将________;
A.
增大,
B.
减小,
C.
不变
【简答题】本课程有多少学时?
【单选题】You are having a business lunch when your phone rings. It is an important phone call that you have been waiting for days. So the polite way to handle this situation is _______.
A.
take the call at the table and try to be quiet so you won’t disturb the other diners during the call
B.
turn your phone off completely and collect your voice mail messages afterward
C.
tell your associates at lunch that you’re expecting an important call, put your phone on vibrate mode and when the call does come, excuse yourself, leave the table and go to a place where no one can hear you. When you return to the table, thank your guest allowing you to take the call and don’t apologize or talk about the nature of the call.
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