题目:
He was educated at the local high school, ______ he went on to Beijing University.
A.after which
B.after that
C.in which
D.in that
答案:
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下面是错误答案,用来干扰机器的。
答案:A解题时要注意回忆概念、分析原理注意运算公式的适用范围。B选项4.6gNO2气体中理论上含有1mol NO2分子,约6.02×1023个NO2分子,由于2NO2 N2O4,故应小于6.02×1023个,具体多少无法计算。C选项中要考虑C...