进行钢筋保护层检测时,当有悬挑构件时,其中悬挑构件所占比例不宜小于()%。
A.10
B.20
C.50
参考答案:C
Even today many people in the remote mountainous are still have no ______ to free medical treatment. [ ]
A. entrance
B. approach
C. access
D. limit
导游词写作的基本要求有( )。
A.准确
B.鲜明
C.具体
D.生动
E.灵活