题目内容：

英语与科学的几道题目
We have (d )ourselves into three groups since this term
A library keeper is another way of saying a (l )
下列情况是消耗势能的?
A箭能射穿靶心 B上发条的钟在走动 C风吹风车转动 D蜜蜂在空中飞行