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搜题
【单选题】
在电场中，单位正电荷由a点移到b点时，电场力所做的功称为a点到b点的（）。A.
电压
B.
电位差
C.
电位
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皮皮学刷刷变学霸
举一反三
【单选题】What are families required to do after they receive support from Heifer International?
A.
They should give some money to the organization in return.
B.
They should give the animals' first babies to other people in need.
C.
They should help other families the way the have been helped.
D.
They should explain their needs and goals.
【单选题】Where should you put it after you receive a name card?
A.
In the back pocket of my pants.
B.
In my wallet.
C.
In the coat pocket or the card holder.
D.
Anywhere.
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