题干
— What's Lisa's opinion?
— Sorry, I don't know. I haven't got her reply .
A：so far
B：at times
C：some day
D：the other day
答案(点此获取答案解析）
A
— What's Lisa's opinion?
— Sorry, I don't know. I haven't got her reply .
A：so far
B：at times
C：some day
D：the other day
，今在两板正中央
处放一电荷
，则它受到的电场力大小为( )
