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问题 填空题

若复数（1+ai）（2+i）=3-i，则实数a的值为______．

答案

由（1+ai）（2+i）=3-i，得（2-a）+（2a+1）i=3-i．

所以

2-a=3
2a+1=-1
，解得a=-1．

故答案为-1．

单项选择题

当快速路单向机动车道数小于3条时，应设不小于（）的应急车道。

A．1．5m

B．2．0m

C．2．5m

D．3．0m
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阅读理解
阅读理解。
                                        MOVIE POSTER
Movie Name: Avatar (阿凡达)
Director (导演): James Cameron
            (The famous director of "Titanic" come back!)
Time: (1) 9:00 a.m., 10:20 a.m., (Only for RMB25, From Monday to Friday) 
         (2) 14:30, 16: 40. (For RMB 45, From Monday to Friday)
         (3) 19:00. 20:30. all day on weekends (Full Price-For RMB 80)
  (There is only one IMAX 3D at 19:30 p.m., For RMB 100) 
                       Excellent!! You can't believe! Come soon!
1. The name of the movie is            . 
[ ]
A. Superman
B. Avatar
C. Titanic
D. 2012
2. If you only have RMB30, you have to go there at             from Monday to Friday.
[ ]
A. 10:20 a.m.
B. 14:30
C. 19:00
D. 19:30
3. You want to see IMAX 3D, you have to go there at            .
[ ]
A. 10:20 a.m.
B. 14:30
C. 19:00
D. 19:30
4. The full price of the movie is            .
[ ]
A. RMB 25
B. RMB 45
C. RMB 80
D. RMB 90
5. If you go to the cinema at 16:40 on Sunday afternoon, you will pay            .
[ ]
A. RMB 25
B. RMB 45
C. RMB 80
D. RMB 100
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