为启动定时器控件，需要设置定时器的属性是( )。
A．Name
B．Interval
C．Left
D．Top
参考答案：B
The room, although_________ to be kept locked, was often left open.
A．supposing
B．supposed
C．to be supposed
D．having supposed
敷设管道电缆的曲率半径必须大于电缆直径的（）倍。
A.5
B.10
C.15
D.20
