问题
单项选择题
为便于计数，输入通道的作用是将任意输入信号整形为计数器所需的（）。
A.三角波信号
B.锯齿波信号
C.脉冲波信号
D.正弦波信号
答案
参考答案：C
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为便于计数，输入通道的作用是将任意输入信号整形为计数器所需的（）。
A.三角波信号
B.锯齿波信号
C.脉冲波信号
D.正弦波信号
参考答案：C
James sat outside the office waiting for the interview. He felt so nervous that he didn’t know what to do with himself .The person who had gone in ___小题1:___ him had been there for nearly an hour. And she looked so ____小题2:_______when she went in. not like James. He felt sure that she had already got the ___小题3:___. The problem was that he wanted this job so much. It meant ___小题4:___ to him. He had thought about it again and again such a lot before the day of the interview. He had imagined himself ___小题5:___ brilliantly at the interview and being offered the job __小题6:____. But now here he was feeling ___小题7:___.He couldn’t remember all those things he had planned to say. At that moment, he almost decided to get up and ___小题8:___. But no — he had to do this. He had spent so much time considering it that he couldn’t ___小题9:__ like that. His hands were hot and sticky and his mouth felt dry. At last the door of the office opened. The woman who had gone in an hour earlier came out looking very ___小题10:___ with herself. She smiled sympathetically at James. The managing director then appeared at the office door. “Would you like to come in now, Mr. Davis? I’m sorry to have kept you waiting.”
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