ATC面板IDENT电门作用是（）.

A:按下后ATC发送代码 B:按下后发送一个特殊的位置识别脉冲信号 C:按下后测试ATC系统 D:按下后控制面板LCD闪亮

当ATC/TCAS控制面板上的IDENT钮按下时（）。

A:ATC系统进行自测试 B:4位数字识别代码开始闪烁 C:ATC应答机发射特别位置识别脉冲 D:系统转换到备用系统

According to the passage, we can say that anthropology ______.

A:can deal with human beings as one group of the creatures in the living world B:can reveal an enormous diversity of traditions C:can provide insights into the relationship between human beings and nature D:can distinguish the human race from other creatures

There is little we can do about it, ______

A:is there B:can’t we C:isn’t there D:can we

I can't imagine he has done it, ______

A:can't I B:can I C:has he D:hasn't he

How (can) you do such (thing) (without) (permission)

A:can B:thing C:without D:permission

There is little we can do about it, ______

A:is there B:can't we C:isn't there D:can we

It can be concluded from the passage that ______.

A:the value of a college degree has decreased now B:new college graduates today can't find jobs C:a college degree can still lead to a good job D:graduates must prepare early to find jobs

My sister can't cook______.

A:my brother can't too B:either can my brother C:neither can my brother D:nor my brother can