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【单选题】
用样本信息推断总体特征叫统计推断。统计推断包括两部分内容,它们分别是A.
总体和样本
B.
参数估计和假设检验
C.
平均水平和变异程度
D.
参数与统计量
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反馈参考答案：
举一反三
【单选题】He helped the workers with the defense _______their interests.
A.
about
B.
against
C.
by
D.
of
【单选题】I think this is the very work that we must finish ____ her.
A.
to help
B.
help
C.
helping
D.
helped
【单选题】With his mother_______ him, he is getting on well with his work.
A.
helping
B.
to help
C.
help
D.
helped
【单选题】I will ___ you to dinner because you helped me with my work.
A.
treat
B.
thank
C.
make
【单选题】要为文本或图像添加 E-mail 链接,需要在“链接”框中邮箱地址前添加()。 To add an E-mail link to a text or image, what code () needs to be added before the E-mail address in the link box?
A.
news:
B.
fip://
C.
http://
D.
mailto:
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