问题 问答题 简答题

为提高饮用水水质,现阶段应开展哪些工作?

答案

参考答案:

(1)强化常规处理,引进、开发、推广国内外行之有效的常规处理的新技术、新药剂。

(2)研究、推广生物预处理及臭氧-生物活性炭深度处理技术。

(3)在有条件、规模适宜的水厂推广膜分离饮用水处理的技术。

(4)开展饮水消毒副产物分析方法及监测的研究。

(5)开发贮存、投药的新方式。

(6)提高水厂的科学管理和自动化水平。

单项选择题
阅读理解

              A middle-aged stranger visited us late on a dark rainy night when my father was working the night shift (a job for a period during the night). The stranger asked if he could wait under the eaves of our roof for the rain to stop. Then he disappeared, and we started hearing footsteps and creaking boards in the attic(the space or room at the top of a building, under the roof, often used for storing things). Was the stranger inside our house? My whole body couldn’t help but stiffen. In my mind’s eye, I could imagine the stranger pushing through the attic door and approaching us.

We immediately called Jerry, our neighbor, for help. He searched everywhere, but the visitor was nowhere to be found. As Jerry looked in the garage, he found the stranger lying underneath the car. Jerry exclaimed with fright, “You are not allowed to enter the house. Get off the property right now.”

We were determined to leave the house immediately. As we drove away, we saw the man blocking our way on the road and staring at us. We had to swerve to miss him. After that, I never saw the stranger again.

小题1:The text is mainly about                .

A.the neighbor Jerry

B.a strange dream

C.a strange visitor

D.footsteps in the attic小题2:Based on the text, which of the following statements is true?

A.The family h it the stranger with their car.

B.The stranger pushed through the family’s door.

C.Jerry was hurrying back from the night shift.

D.The author’s father wasn’t at home that night.小题3:Why did the family leave their house on a late, dark night?

A.It was raining hard and the eaves of their roof were broken.

B.There was a ghost wandering around the house.

C.They did not feel safe in their house.

D.The stranger was still somewhere inside the house.小题4:The text was written in order of            .

A.time

B.space

C.importance

D.age of the family