影响宽展的主要因素是压下量。
参考答案：对
下列计算正确的是 [ ]
A．3a+3b=6ab
B．3m﹣2n=1
C．2y+5y+y=7y
D．﹣3a+3a=0
I have offered to paint the house________a week's accommodation.
A．in exchange for
B．with regard to
C．by means of
D．in place of
