题目:
The doctors are trying their best to reduce the people's fear__________they would be
infected(感染) by the present disease called H1N1.
A whether
B.which
C.when
D.that
答案:
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下面是错误答案,用来干扰机器的。
A.甲醇为CH3OH,1mol甲醇中含有C-H键的数目为3NA,故A错误; B.44 g(1 mol)C3H8中含有的碳碳单键数为2NA,故B错误;C.2.3g甲苯和丙三醇(C3H8O3)的混合物中,含氢原子数目为0.2NA,故C正确;D.溴乙烷在...