单项选择题
A.低压槽 B.高压脊 C.低压带 D.高压带
A.700hpa等压面图上308m等高线 B.700hpa等压面图上3080m等高线 C.500hpa等压面图上308m等高线 D.500hpa等压面图上3080m等高线
A.999.9hpa B.1099.9hpa C.999.9mmHg D.1099.9mmHg
A.700hpa等压面图上588m等高线 B.700hpa等压面图上5880m等高线 C.500hpa等压面图上588m等高线 D.500hpa等压面图上5880m等高线
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