圆外切等腰梯形的中位线等于8,则一腰长等于 [ ]
A.4
B.6
C.8
D.10
答案:C
I think the director's attitude___ this program will decide what we should do next. [ ]
A. for
B. of
C. at
D. towards
以下关于日光性皮炎临床表现的描述错误的是()
A.多见于长期曝晒的人群
B.发生于曝晒以后2~12小时
C.皮损多位于曝晒部位
D.皮损消退后可遗留脱屑和暂时性色素沉着