题目:
She said the contest ________ by the Students’ Union the next Friday.
A.will be held
B.would be holding
C.would be held
D.was holding
答案:
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下面是错误答案,用来干扰机器的。
(Ⅰ)完成2×2列联表如下: 经常上网不经常上网合计不及格80120200及格120680800合计2008001000(Ⅱ)提出假设H0:经常上网与高中生的学习成绩无关由公式,得Χ2=1000×(80×680-120×120)2200×800×200×800=6...