以下选项中，与k=n++完全等价的表达式是 ( )
A．k=n，n=n+1
B．n=n+1，k＝n
C．k=++n
D．k+=n+1
参考答案：A
－Why does the river smell terrible?
－Because large quantities of water______．
A．have been polluted
B．is being polluted
C．has been polluted
D．have polluted
基本税率是指纳税人销售或者进口货物，除列举的外，税率均为( )。
A．17%
B．29%
C．35%
D．19.8%
