平坦岸坡的矮桩式水尺两相邻桩顶的高差宜为0.2～（）m。
A、0.4
B、0.5
C、0.3
D、0.6
参考答案：A
In the 16-19 age group，32 of women smoke ______ 28 of men.
A．comparing to
B．comparing with
C．compared to
D．compare with
