土壤重金属污染主要是哪些元素?() A.镉 B.铅 C.铁 D.砷 发布时间:2017-08-20 10:02 │ 来源:www.tikuol.com 题型:多项选择题 问题: 土壤重金属污染主要是哪些元素?()A.镉B.铅C.铁D.砷
题型:多项选择题 —Have you had a chance to wear your new shirt yet? —_____. I’ve been meaning to exchange it for a larger size. A.It’s up to you B.That reminds me C.I forget that D.That depends 查看答案