这种材料接触热表面时会释放出危险的气体( )
A.This material replaces dangerous fumes when it touches hot surface. B.This material releases dangerous fumes when it touches hot surface. C.On contact with hot surfaces,this material produces acrid fumes.正确答案B
这种材料接触热表面时会释放出危险的气体( )
A.This material replaces dangerous fumes when it touches hot surface. B.This material releases dangerous fumes when it touches hot surface. C.On contact with hot surfaces,this material produces acrid fumes.正确答案B