从过滤开始到冲洗结束的一段时间称为快滤池工作周期。
参考答案:对
35. —It took me ten years to build up my business, and it almost killed me.
—Well, you know what they say, “___________.”
A.There is no smoke without fire;
B.Practice makes perfect;
C.All roads lead to Rome;
D.No pains, no gains
读《五带划分图》回答。(7分)
(1)写出图中字母所处的五带名称:
A_____________带 B____________带 C_____________带
(2)写出图中数码纬线的纬度。①________________ ③________________
(3)有极昼极夜现象的是___ _ 带,有阳光直射现象的是________带。