可致水质发黑、发臭的是()。 A.耗氧作用>复氧作用 B.耗氧作用 C.耗氧作用=复 发布时间:2017-05-30 01:33 │ 来源:www.tikuol.com 题型:单项选择题 问题: 可致水质发黑、发臭的是()。A.耗氧作用>复氧作用B.耗氧作用<复氧作用C.耗氧作用=复氧作用D.氧垂曲线溶解氧的最低点>4mg/LE.氧垂曲线溶解氧的最低点<4mg/L
题型:单项选择题 September 10th is . [ ]A. Women's Day B. Children's DayC. Mid-autumn Day D. Teachers' Day 查看答案
题型:单项选择题 What did you do with those books given by the volunteers?A.What; deal withB.How; deal withC.How; do withD.What ; use with 查看答案