采区入风流净化水幕,风流分叉口支流内侧20-50米巷道内。()
参考答案:对
It ’s well-known that ________ information is very important to businessmen.
A.having collected
B.collecting
C.collected
D.collect
扩展名______不是Windows系统下可执行文件的扩展名。
A.COM B.EXE C.DLL D.INI