一个平角和一个直角的和是( )
A.360°
B.180°
C.270°
D.90°
180°+90°=270°,
故选:C
The test math was difficult, _____ he got a good grade. [ ]
A. so
B. or
C. and
D. but
应用( )软件不能在 Windows环境下搭建 WEB服务器。
A.IIS
B.Serv-U
C.WebSphere
D.WebLogic