Trichloroethylene is a health hazard. ( )
A.When there is trichloroethylene, you shouldn' t worry about it. B.Trichloroethylene is good for health. C.Trichloroethylene is hazard for health.正确答案C
Trichloroethylene is a health hazard. ( )
A.When there is trichloroethylene, you shouldn' t worry about it. B.Trichloroethylene is good for health. C.Trichloroethylene is hazard for health.正确答案C