55._________A.Traditionally B.Surprisingly C.Conv

55._________A. lengthB. dealC. lotD. extent

55._________A. letsB. allowsC. makesD. leaves

55._________A. inB. atC. withD. out

55._________A.Traditionally B.Surprisingly C.Conv

56._________A.surprised B.surprisingly C.surprise

化学泡沫灭火器的使用温度范围是________A．-10～55℃ B．-21～55℃ C．4～55