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【单选题】
若已定义x和y为float类型，且x=1；则表达式y=x+3/2的值是( )。A.
2.000000
B.
2.500000
C.
1
D.
2
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举一反三
【单选题】Ann：May I help you wash up，Mum?Mum：__________．
A.
Yes，you may
B.
N0，you can’t
C.
Thank you，you’re so helpful
D.
Thanks all the same
【单选题】Shop-assistant：May I help you，sir?Mr．Blair：Er…1 want to buy my wife a gift for Christmas，but I don’t know what she would like． Shop assistant：?These are all from Paris． Mr．Blair：N0．She has very good t...
A.
Do you want to buy a pair of shoes
B.
What about a gold necklace
C.
How about an evening gown
D.
Don’t you think a gold watch would be very nice
【单选题】—Good morning， sir. May I help you?rn—_______
A.
No， I don’t buy anything.
B.
No， I don’t need your help.
C.
I’m just having a look around.
D.
Oh， no. That’s OK.
【简答题】听力原文：F: Leisure Travel Agency, Mary speaking. How may I help you? M: Can I speak to Jack, please? F: I'm afraid he's out to lunch. Can I take a message? M: Yes, please. My name's Vicksin. F: That's V-...
【简答题】某基准物A的摩尔质量为130g·mol -1 ，用来标定0.02mol·dm -3 的B溶液，该滴定反应为5A+2B====2C则每份基准物的称取量为 (A) 0.02～0.03g (B) 0.06～0.07g (C) 0.1～0.2g (D) 0.2～0.4g
【简答题】简述成纤维细胞的结构和功能。
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