相关题目
A （ ） is an area of low pressure surrounded by higher pressure.
A （ ） is a center of high pressure surrounded on all sides by lower pressure.
The resulting pattern of the isobars reveals the change in pressure over distance, which is normally called （ ） ．
The feature associated with the tropopause is （ ） ．
The lines of equal wind velocity are called （ ） ．
The lines that connect points of equal temperature are called （ ） ．
When an aircraft is flying （ ）, we call it super low-altitude flying.
Uneven heating modifies air density and creates circulation patterns, resulting in changes in pressure. This is one of the main reasons for differences in （ ） between weather reporting stations.
A characteristic of the stratosphere is （ ） ．
The primary cause of all changes in the Earth’s weather is （ ） ．
