三峡是我国著名的旅游景点之一,古人记载三峡说“巴东三峡巫峡长,猿鸣三声泪沾裳”,你知道这位古人是谁吗?[ ]
A.郦道元
B.贾思勰
C.祖冲之
D.张衡
答案:A
—Did he go to sleep late?
— .[ ]
A. Yes, he didn't
B. Yes, he does
C. No, he didn't
D. No, he doesn't
新建线路时,在弹出的新建线路对话框中,线路起点类型为“杆塔”,用于什么情况下?