已知x2-1=3x，则多项式3x3-11x2+3x+2的值为()。
A. 1
B. 2
C. -1
D. 0
E. 土1
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You should have been more patient ______ the customer, I'm sure that selling him the colour TV set was a possibility.
A. of
B. for
C. with
D. against
在实数范围内将(ax+by)2+(ay-bx)2+c2x2+c2y2分解因式，得()．
A. (a+b+c)(x2+y2)
B. (a2+b2+c2)(x2+y2)
C. (a2+b2-c2)(x2+y2)
D. (a2+b2+c2)(x2-y2)
E. 以上答案均不正确
The last paragraph implies that RFID technology ______
A. will not be used for such matters as buying milk
B. will be widely used, including for buying milk
C. will be limited to communication uses
D. will probably be used for pop music
A．copyB．comerC．color
A. copy
B. comer
C. color
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