“入芝兰之室，久闻不觉其香”，这是（） A.知觉 B.感觉对比 C.适应 D.感觉

At the end of the race his legs ____ and he fell down on the ground.

A．gave out

B．gave off

C．worn out

D．used up

JTl型通用式机车信号，主机电源块开关频率为（）。

护患进行沟通的理想距离宜采用（）

A.亲密距离

B.个人距离

C.社会距离

D.公众距离

E.一般距离

Long,long time ago,there was a mountain.At the top of the mountain _______,in which an old monk used to tell stories.

A．a temple stood

B．is there a temple

C．stood a temple

D．a temple was there

在Excel中，如果中误打开了一个菜单，可以按（）键关闭此菜单.

A.Del

B.Esc

C.Delete

D.End