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【多選題】
電量為q的點(diǎn)電荷，在兩個(gè)固定的等量異種電荷+Q和-Q的連線的垂直平分線上移動(dòng)，則：（ ）
A.
電場(chǎng)力做正功
B.
電場(chǎng)力做負(fù)功
C.
電場(chǎng)力不做功
D.
電場(chǎng)力做功的正負(fù)，取決于q的正負(fù)
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舉報(bào)參考答案：
舉一反三
【單選題】Every person needs water and a diet of healthy food ______some fat, some fibre and a little salt .
A.
gaining
B.
containing
C.
keeping
D.
including
【單選題】He insisted he_ _ ill , but I suggested medical care_ ____to him .
A.
wasn’t/was given
B.
was/was given
C.
wasn’t/be given
D.
was/should given
【單選題】He apologized ________ late.
A.
to his teacher to arrive
B.
at his teacher for arriving
C.
at his teacher to arrive
D.
to his teacher for arriving
相關(guān)題目：
【單選題】Every person needs water and a diet of healthy food ______some fat, some fibre and a little salt .
A.
gaining
B.
containing
C.
keeping
D.
including
【單選題】He insisted he_ _ ill , but I suggested medical care_ ____to him .
A.
wasn’t/was given
B.
was/was given
C.
wasn’t/be given
D.
was/should given
【單選題】He apologized ________ late.
A.
to his teacher to arrive
B.
at his teacher for arriving
C.
at his teacher to arrive
D.
to his teacher for arriving
參考解析：
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