题型:名词解释 Mary told me that she an old people house the next day.A. will visit B. would visit C. is going to visit 查看答案
题型:名词解释 某水域经4次监测CODcr的浓度为:17.3mg/l、18.6mg/l、19.0mg/l、20.6mg/l,用内梅罗法计算CODcr的统计浓度值是()mg/l。A.25.6B.23.4C.21.5D.19.9 查看答案