在流动的液体中因某点处的压力低于空气分离压而产生空泡的现象称之为()
参考答案:空穴现象
We have _________ many more school clubs and organized a lot of interesting activities this term.
A.taken up
B.put up
C.set up
D.picked up
下图为北半球中纬地区局部环流示意图。读图回答题。
M地所吹风向是()
A.东北风
B.西北风
C.西南风
D.东南风