宾馆、饭店、商市场、歌舞厅等人员密集场所营业期间，安全出口的安全门禁止锁闭（ ）
参考答案：对
沾流
Windows 7 was created in 2009, ___ many computer lovers were interested and excited. [ ]
A. where
B. why
C. which
D. when
