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【单选题】
关于标准差 , 表述正确的是A.
标准差与原始数据的单位不相同
B.
标准差与原始数据的单位相同
C.
标准差没有单位
D.
同一资料的标准差一定比均数大
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反馈参考答案：
举一反三
【单选题】--- What book are you reading? Wow, Harry Porter ! May I have a look at it? --- Yes, of course. You have it as soon as I get through with it.
A.
must
B.
should
C.
will
D.
shall
【单选题】Wow, you are in high spirits. _________ makes you so happy?
A.
What it is that
B.
What is it that
C.
What is that
D.
What it that
【单选题】— Hey! Don't you remember me? — Wow! Mary? You _____ curly hair. But now you have straight hair. [ ]
A.
used to have
B.
were used to have
C.
are used to having
【单选题】-What time is it? -It's __ . [ ]
A.
a quarter to five
B.
quarter to five
C.
quarter five
【单选题】The train from Shanghai will arrive ___________ A. in quarter past six B. in a quarter past six C .at quarter past six D. at a quarter past six
A.
in quarter past six
B.
in a quarter past six
C.
at quarter past six
D.
at a quarter past six
【单选题】–Wow! What a nice skirt you are wearing! -________.
A.
Thank you
B.
I think so
C.
No, it’s bad
【单选题】—How to say 8:45 in English? — ____ [ ]
A.
A quarter past eight.
B.
A quarter to eight.
C.
A quarter past nine.
D.
A quarter to nine.
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