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【单选题】
额定电压为 220 V 的三相对称负载,用线电压为 380V 的三相对称电源供电时,三相负载应连接成 ( ) 。A.
星型
B.
三角型
C.
不确定
D.
星型和三角型都可以
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举一反三
【单选题】—Do you like living in this community? — Yes, of course. I ________ here! A. had a colorful life B. having a colorful life C. have colorful life D. have ...
A.
had a colorful life
B.
having a colorful life
C.
have colorful life
D.
have a colorful life
【单选题】My sister bought me a new camera. I don't know ______. Can you help me? [ ]
A.
how to use it
B.
how to use
C.
what to use
D.
what to use it
【单选题】He didn't notice me in the crowd but he spotted my sister who was _______ because of her red hair.
A.
conscious
B.
conspicuous
C.
dim
D.
conscientious
【简答题】Remember those big, colorful books with large pictures of balls or apples when you were a little kid? Those have proven to be helpful, according to a number of studies. Between 1 and 5 years old, intr...
【简答题】Those colorful pictures __________(distribute) among children in Ivy's class just now.
【简答题】Lego, the inventor of those colorful bricks that have inspired kids’ imaginations world-wide, has celebrated its 50th anniversary. On January 28, 1958, a man named Godtfred Kirk Christiansen created t...
【单选题】听力原文：M: Look at those colorful birds over there. I think you can teach them to talk. W: Yes, but look at the price tag on them. Frankly, I'd rather have a hamster for two fifty. Q: Where did this conv...
A.
In a park.
B.
In a museum.
C.
In a zoo.
D.
In a pet store.
【简答题】Those colorful pictures ______among children in Ivy ’ s class just now.
【单选题】College life ___. A. is color B. is colorful C. are colorful
A.
is color
B.
is colorful
C.
are colorful
D.
/
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