选词填空。（共10空。每空1分，共10分。）

Every year many people get hurt or   小题1:   their lives in traffic accidents. How can we keep ____小题2:___ when we walk on the roads? First，we must    小题3:    .the traffic rules. In most pants of China，we walk  小题4:  the right of the road. Second， 小题5:    we cross the road，we must stop and   小题6:   both ways—look left，look right and look left 小题7: .Third，we must __小题8:____ play on the street.  小题9:   ，it’s good to help children and old people    小题10:    the road.

在开发利用金属矿物和海水资源过程中，下列说法不正确的是

A．工业上可用电解法冶炼得到金属铝

B．海水蒸发制海盐的过程中只发生了化学变化

C．海水淡化的方法主要有蒸馏法、离子交换法等

D．海水中含有钾元素，需经过氧化还原反应才可得到钾单质