印度是世界四大文明古国之一，它位于亚洲的______部，目前人口居世界第_____位。
南；二
— Why do you look so worried?
— My MacBook Pro broke down and my paper ______ unfinished since. [ ]
A. was left
B. has left
C. left
D. has been left
隧道竣工后，应在直线地段每( )处，测绘以路线中线为准的隧道实际净空。
A．50mm
B．70m
C．80m
D．100m
