三相桥式整流电路中，每只二极管的电流是负载电流的（）。
A.1/6
B.1/4
C.1/3
D.1/2
参考答案：C
判断对错，对的画“√”，错的画“×”。
( )1. Sarah: How are you?
Bai Ling: Fine, thank you!
( )2. Li Ping: How old are you?
Wu Yifan: I'm nine.
( )3. John: Thank you !
Mike: You're welcome.
( )4. Chen Jie: May I have a look?
Bai Ling: Look!
( )5. John: What's your name?
Bai Ling: My name is Bai Ling.
( )6. Tom: Let's go to school, OK?
Sarah: Great!
肺经腧穴中，既可治疗咳喘、咽痛，能治疗头面五官疾患的首选穴：（）。
A.尺泽
B.孔最
C.列缺
D.太渊
E.少商
