【简答题】基础埋置深度是指从( )到( )的垂直距离,其深度不能小于( )mm。
【简答题】A.She doesn't know much about painting. B.She should have started sooner. C.She ought to know when the class begins. D.She worries too much.
【多选题】下列讲解内容中,属于地陪在景点示意图前影响旅游者讲清的有( )。
【多选题】下列讲解内容中,属于地陪在景点示意图前应向旅游者讲清的有()