下列现象对近海养殖业会产生毁灭性灾害的是( )
A:寒潮
B:洋流
C:赤潮
D:潮汐
如图所示,小明从滑梯高处加速下滑,臀部有热乎乎的感觉,这过程中小明的动能____ ,机械能____ (选填“增大”、“减小”或“不变”).
选择合适的词组, 并用其正确的形式填在横线上。
run across the road put out be born go on a picnic leave for
be made of have to take one’s advice more than plenty of