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【单选题】
测定一个苹果品种的重量,得到具有 15 个观测值的一个样本资料,计算标准差自由度为( )A.
1
B.
15
C.
14
D.
16
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【单选题】______ you are proven innocent, you can shake off all the shadows cast on you.
A.
While
B.
Even though
C.
Now that
D.
For
【单选题】To have a dinner at a restaurant on the Eve of the Spring Festival, you need to reserve the restaurant months before it, ____? [ ]
A.
mustn't you
B.
didn't you
C.
don't you
D.
needn't you
【单选题】To tell you the truth, if you want to study abroad, you must pay more attention to ______English every day.
A.
practise speaking
B.
practising speaking
C.
practising to speak
D.
practise to speaking
【单选题】— Jack will come to see you next Friday. Do you prefer the morning or the afternoon? — ____, the evening would be better. You know, everyone will be free then. [ ]
A.
None
B.
Either
C.
Neither
D.
Both
【单选题】— Are you fond of Liu Qian's performance on the eve of the Spring Festival? — No. _____. [ ]
A.
I didn't get it
B.
That's not the point
C.
I've got no idea
D.
It's not my cup of tea
【单选题】To have a dinner at a restaurant on the Eve of the Spring Festival, you need to reserve the restaurant months before, _____? [ ]
A.
mustn't you
B.
didn't you
C.
don't you
D.
needn't you
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