在电子电路中，将单向脉动电压中的脉动成分滤掉，使输出电压成为_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题填空题

在电子电路中，将单向脉动电压中的脉动成分滤掉，使输出电压成为比较平滑的直流电压的电路称（）。

答案

参考答案：滤波器

单项选择题 A1/A2型题

下列那种抗生素会引起"灰婴综合症"（）

A.红霉素

B.氯霉素

C.青霉素

D.克林霉素

E.庆大霉素

单项选择题

Questions 14-23

·Look at the ten statements for this part.
·You will hear a story about communication through time.
·Decide whether you think each statement is right(R), wrong(W) or not mentioned(NM).
·You will listen to it twice.
·Mark your answers on the Answer Sheet.

As Andrew had a flat tire on the way be asked for a lift to go back home.

A．Right

B．Wrong

C．Not Mentioned