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【单选题】
点电荷Q被曲面S所包围,从无穷远处引入另一点荷q至曲面外一点,则引入前后A.
曲面S上的电通量不变，曲面上各点场强不变
B.
曲面S上的电通量变化，曲面上各点场强不变
C.
曲面S上的电通量变化，曲面上各点场强变化
D.
曲面S上的电通量不变，曲面上各点场强变化
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【单选题】—I will take part in the quiz show next week. —_________.
A.
I will so
B.
So I will
C.
So will I
D.
I will
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