【简答题】序号 项目 断面 A 断面 B 1 COD 26.0 18.2 2 高锰酸盐指数 6.2 5.8 3 溶解氧 4.8 5.2 4 BOD 5 3.8 3.2 5 氨氮 0.34 1.09 6 总氮 0.86 1.12 7 总磷 0.18 0.12 1、根据上面表格中的数据信息,判断某河流断面A与断面B的水质类别分别是?水质状况分别是?表征颜色分别是? 2、断面A与断面B的单项指标水质指数分别是?哪...
【单选题】我国历史上第一个具有宪法性质的文件是( )。
【单选题】Seven______ people went to see the car show the day before yesterday.
【单选题】一般尺寸,无配合尺寸一般选用___的验收极限方式。
【单选题】How long is the Changjiang River? ______.
A.
Three thousand, nine hundred miles.
【单选题】In the terrible tsunami (海啸), many buildings fell down, hundreds of people were killed, and thousands of people were badly _____. [ ]