A．marking upB．mark upC．to mark upD．to mark
A. marking up
B. mark up
C. to mark up
D. to mark
查看答案
"Mr. Going-to-do" ______.
A. always says he is going to do something, but he never does it
B. always talks as much as he does
C. always talks a little but does a lot
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
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
微信支付 
支付宝支付