题目内容

RC电路,一般用于产生1Hz--1MHz的信号

A. 对
B. 错

查看答案
更多问题

LC电路,一般用于产生1MHz以上的信号

A. 对
B. 错

负反馈电路不能产生振荡

A. 对
B. 错

In the eyes of a young boy, the crippled father was ________.

A. an embarrassing sight to be with
B. a clam person
C. a man difficult to talk with
D. a shy person

The father never showed his awareness of being stared at on the street.

A. 对
B. 错

答案查题题库