喷头始终充着满压力水的自动喷水系统是()
A、干式系统
B、湿式系统
C、预作用系统
D、水幕系统
参考答案:B
You must have watched that football match last night, __________?
A.must you
B.haven’t you
C.didn’t you
D.aren’t you
虚劳虚烦不得眠,治用()
A.酸枣仁汤
B.百合地黄汤
C.甘草泻心汤
D.栀子豉汤
E.桂枝加龙骨牡蛎汤