Red Hat Linux是( )。
A．系统软件
B．应用软件
C．管理软件
D．多媒体软件
参考答案：A
.
The coach gave the team members a call immediately the results were announced ,_____them on their success .
A． to congratulate
B．congratulating
C．congratulated
D．having congratulating
轻钢龙骨吊顶中，主龙骨的最大间距为（）㎜。
A．900
B．1200
C．1300
D．1500
