When crossing a front, isobars tend to ________.
2023-12-019000102
When crossing a front, isobars tend to ________.
A.change from smooth curves within the air mass to sharp bends at the front
B.change from sharp bends within the air mass to smooth curves at the front
C.pass smoothly across the front with no change
D.become closer together at the front and pass through in straight lines
正确答案是A
