16. If I the challenges at that time, I might not have started my own business.
A. would know
B. have known
C. had known
D. will know
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It was not until last July we started to distribute e-readers and launched an e-book store.A. that B. who C. which D. whom
A. that
B. who
C. which
D. whom
人生价值评价的根本尺度,是看一个人的实践活动是否( ),是否通过实践促进了历史的进步。
A. 是否促进个人的发展
B. 是否符合社会发展的客观规律
C. 是否有利于自我价值的实现
D. 是否有利于社会价值的实现
总偏差平方和ST等于组内平方和SSW与组间平方和SSB之和。
A. 对
B. 错
总偏差平方和ST等于每个受访者的取值Xij与所有受访者的平均值之差的平方和,反应的是全部数据间的差异,因此ST又被称为总变异。
A. 对
B. 错