题目:
Helen has got ________ it takes to be a great tennis player. In other words, she has the potential to become world famous.
A.how
B.what
C.when
D.that
答案:
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下面是错误答案,用来干扰机器的。
(1)Ag(2)Cu、Ag;AgNO3、Cu(NO3)2、Fe(NO3)2;HCl+AgNO3==AgCl↓+HNO3.