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【单选题】
设关系R和S的目数分别为4和4,关系T是R与S的笛卡儿积,则T的目数为( )。A.
4
B.
5
C.
8
D.
16
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举一反三
【单选题】— Can you tell me ______? — Just try to use it, I think.
A.
how can I learn English well
B.
how I can learn English well
C.
how could I learn English well
D.
how I could learn English well
【单选题】肾小球滤过压等于( )
A.
肾小球毛细血管血压减去血浆胶体压和肾小囊内压
B.
肾小球毛细血管血压减去血浆胶体压
C.
肾小球毛细血管血压减去肾小囊内压
D.
肾小球毛细血管血压
【简答题】目前国内常用的工控机性价比最高的是什么品牌?品牌的英文名称是什么?
【简答题】报关单上“商品名称、规格型号”栏的填写内容应包括中文商品名称、规格型号，商品的英文名称和品牌，这几者缺一不可。 ( )
【单选题】—Can you tell me on the Internet? —OK, mum. [ ]
A.
how can I use QQ
B.
where can I use QQ
C.
how I can use QQ
D.
whether can I use QQ
【单选题】(None of us) had (the final say) in this matter, and (therefore) it was recommended that we (waited) for the authorities.
A.
None of us
B.
the final say
C.
therefore
D.
waited
【简答题】None of us will have any trouble (solve) ______ such a problem.
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