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【简答题】
一组数据x 1 ，x 2 ，x 3 ，x 4 ，x 5 的平均数是5，方差是3，则4x 1 -3，4x 2 -3，4x 3 -3，4x 4 -3，4x 5 -3的平均数是______，方差是______．
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【简答题】Routing : Beijing , CHINA ( BJS ) to London , GB ( LON ) Commodity : Gold Watch Gross Weight : 32.0Kgs Dimensions : 1 Piece 60×50×40CM ,
【单选题】—Can you go swimming with us this afternoon? —Sorry. I ______ look after my little sister at home.
A.
can
B.
may
C.
would
D.
have to
【简答题】自制原始凭证的填制，都应由会计人员填写，以保证原始凭证填制的正确性。（ ）
【简答题】根据句意或首字母完成单词。 小题1:I’m going to v them in China. 小题2:I’m going to l on the beach ,because I e the sun and the sea. 小题3:Helen is going to take the P to Beijing . 小题4:A flower would be a nice g fof your ...
【单选题】—Can you go swimming with us this afternoon? —Sorry. I ______ look after my little sister at home.
A.
have to
B.
can
C.
may
D.
would
【单选题】---Can you go swimming with us this afternoon? ---Sorry, I can't. I ______take care of my little sister at home.
A.
can
B.
may
C.
would
D.
have to
【简答题】Tea is a popular drink in China. Many people can’t live if they don’t have it. Chinese tea has a long history going back more than 5,000 years. A famous person over 1000 years ago wrote a book about h...
【单选题】Can you go swimming with us this afternoon? Sorry, I can't. I ______take care of my little sister at home because my mother is ill.
A.
can
B.
may
C.
would
D.
have to
【单选题】—can you go swimming with us this afternoon? —Sorry, I can't. I______ do the chores at home. [ ]
A.
can
B.
could
C.
can't
D.
have to
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