下列四幅图中，甲地在乙地西北方向，丙地在丁地东南方向的是
A、A
B、B
C、C
D、D
答案：B
The government has taken measures air quality. [ ]
A. to improve
B. improved
C. being improved
D. to be improved
色素性紫癜性皮肤病皮损最常见于（）
A.胫前区
B.大腿屈侧
C.上臂伸侧
D.躯干
E.腰部
