It's windy and cold _________ winter _________ Beijing.
A:on; at
B:on, in
C:in; on
D:in, in
简答:
读“北半球某地近地面与高空气压状况(热力原因形成)示意图”,关于图示甲、乙、丙、丁四地的说法,正确的是 ( )