慢性放射性皮炎一般不出现的皮损是()
A.色素沉着
B.色素脱失
C.毛发消失
D.皮肤增厚
E.皮肤干燥
参考答案:D
It is ( ) irrevocable letter of credit which can not be changed
A.a
B.an
C.the
D./
期颐指多少岁?