经修理后的重要辅助设备的电动机应在工作状态下进行不少于（）的运转试验和机组转换试验。
A．0.5小时
B．1小时
C．2小时
D．2.5小时
参考答案：B
下列属于熟咸馅的馅心有（ ）。
A．鱼蓉馅
B．叉烧馅
C．冬蓉馅
D．水晶馅
.
．It was announced that only when the fire was under control_________to return to their homes．
A．the residents would be permitted
B．had the residents been permitted
C．would the residents be permitted
D．the residents had been permitted
