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【单选题】
用一表法测量三相电路的有功功率时，功率表的读数表示（）。A.
三相的功率
B.
两相的功率
C.
一相的功率
D.
无任何意义
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举一反三
【单选题】—I’m always afraid of giving a speech in front of the class. —____ You can do it well.
A.
I’m sorry to hear that.
B.
Take it easy.
C.
You are too nervous.
D.
Good luck.
【单选题】My name is Dora. I’m American and I’m thirteen. I’m a student in No. 7 Middle School. I like music very much. I can play two instruments — the guitar and the piano. I play them very well and I’m in th...
A.
three
B.
four
C.
five
D.
six
【单选题】--- How will I ______ you at the station? --- Well, I’m wearing a hat and I’ve got a big black umbrella with me.
A.
recognize
B.
notice
C.
see
D.
realize
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