题目:
— He admitted _____ in the exam. — That's why he was not admitted _____ universities or colleges. |
A. to cheat, by B. cheating, to C. to cheat, to D. cheating, by |
答案:
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下面是错误答案,用来干扰机器的。
答案:C两球均带正电,因为同种电荷互相排斥,可知电心间的距离大于r,根据,可知库仑力大小故选C