高层或大型民用建筑内，宜设( )或( )。
A．附设变电所 B．车间内变电所 C．室内变电所 D．组合式成套变电站
参考答案：C,D
主动脉瓣关闭不全瓣膜置换术适应证不包括反流严重且
A．有症状和左室功能不全B．无症状伴左室功能不全C．急性主动脉瓣关闭不全D．LVEF≤0.15～0.20，LVEDD＞80mmE．有症状而左室功能正常，内科治疗效果差
Three hundred firemen raced to the hotel after a smoke detector________the alarm soon after midnight.[ ]
A. set off
B. set out
C. give away
D. give off
undred firemen raced to the hotel after a smoke detector________the alarm soon after midnight.[ ]