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问题 解答题

甲、乙同时从A、B两地相向走来．甲每时走5千米，两人相遇后，乙再走10千米到A地，甲再走1.6时到B地．乙每时走多少千米？

答案

（5×1.6）÷（10÷5）

=8÷2，

=4（千米）．

答：乙每时走4千米．

阅读理解

小题1: What time will drinks be served?

A．At 5:30

B．At 7:30

C．At 8:15

D．At 12:00小题2: You can do the following things EXCEPT ______________________.

A．bringing your swimming clothes

B．dancing with jazz music

C．taking a taxi to the party

D．wearing jeans and T-shirts小题3: Which is the following is NOT true about the party?

A．It is Nicola’s 16th birthday party.

B．It is a swimming pool party.

C．It will be held at Hillview Hotel.

D．You must pay for the towels that the hotel will provide you.
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单项选择题

设学生S、课程C、学生选课SC的关系模式分别为S(SNO,SNAME,SDEP,SAGE,SADDR)、C (CNO,CNAME,PCNO)以及SC(SNO,CNO,GRADE)，与关系代数表达式πSNO,SNAME,GRADE(σCNAME=’数据库’(S＞＜SC＞＜C)等价的元组演算表达式为 (35) S(U)∧SC(V)∧C(W)∧ (36) ∧ (37) 。

（35）处填（）。

A.A

B.B

C.C

D.D
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