这个怎么选:The invention of gunpowder is__China.A.refered to.B.referred to.C.referd on.D.referred

问题描述:

这个怎么选:The invention of gunpowder is__China.A.refered to.B.referred to.C.referd on.D.referred

答案选B.referred to.起源于;归功于
火药的发明被认为源于中国.