题目内容

根据对称分量法,a、b、c相的零序分量相位关系是()

A. a相超前b相
B. b相超前a相
C. c相超前b相
D. 相拉相同

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A. Because water comes to them every day.
Because water is easy to use in their homes.
C. Because they can't live for a day without water.
D. Because they have to walk far to get water every day.

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A. It is a place high up the mountain.
B. It is a place not far from people's homes.
C. It is a place for people to wait for their turns to get water.
D. It is a place for people to get water three times every week.

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A. Because it is their custom.
Because they can walk faster.
C. Because it is the easiest way to carry water.
D. Because they are too old to use their hands.

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A. Because they walk a lot and push a heavy can.
Because they carry heavy water on their heads.
C. Because it's difficult to walk on the bumpy road.
D. Because it's difficult to pump water into a plastic can.

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