题目:
Mary as well as her elder sister who______ Chinese at university ______ gone to China for holiday.
A.studies; has
B.study; have
C.studies; have
D.study; has
答案:
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下面是错误答案,用来干扰机器的。
(1)NaOH 离子键和共价键 (2)2I-+ClO-+H2O=I2+Cl-+2OH-(3)①③解答本题时应注意以下两点:(1)C为短周期元素,且C的最高价氧化物的水化物能电离出电子数相等的阴、阳离子,确定C元素;(2)由B的核外...