问题 选择题

方程x2-3x+2=0的解是(  )

A.1和2

B.-1和-2

C.1和-2

D.-1和2

答案

x2-3x+2=0,

因式分解得:(x-1)(x-2)=0,

可得:x-1=0或x-2=0,

解得:x1=1,x2=2.

故选A

完形填空
完形填空。

Dear David,
     Please    1    to my home for    2    at six this evening. Now let    3    tell you    4    to get to my home.
When you walk out of school, you should    5    a No.2 bus and then    6    at Xinhua Road. Then turn rigt
into Dongfeng Street and walk    7    this street. Take the first turnig    8    the left. My home is in the third
building on the right. There is a big tree    9    the building. I live on the fifth floor. And I'll   10   for you at
the gate. 
                                                                                                                                                Yours, 
                                                                                                                                                 Li Lei

( )1.A.come  
( )2.A.meal  
( )3.A.I     
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( )10.A.look  
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D.see         
单项选择题