A.消火栓按钮
B.带插孔的手报按钮
C.消防广播音响
D.消防电话
[单选题]A.0.273;-48B.0.273;48C.0.294;-48D.0.294;48
[单选题]A.0.273;-48B.0.273;48C.0.294;-48D.0.294;48
[单选题],,,,,( )。A.5.9B.1.83C.6.5D.7.8
[单选题],,,……,这239个数中所有不是整数的分数的和是多少?( )A.2230B.2140C.2350D.2200
[单选题],,,,( )。A.B.C.D.
[单选题],,,,,,( )。A.B.C.D.
[单选题],,,2,( )。A.3B.C.D.
[单选题],1,,( )。A.B.C.D.
[单选题],1,,( )。A.B.C.D.
[单选题]等于( )。A.B.C.D.