问题
单项选择题
What kind of pressure systems travel in easterly waves（）.
A.High pressure
B.Low pressure
C.Subsurface pressure
D.Terrastatic pressure
答案
参考答案：B
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What kind of pressure systems travel in easterly waves（）.
A.High pressure
B.Low pressure
C.Subsurface pressure
D.Terrastatic pressure
参考答案：B