试题与答案

阅读下面的文字,完成1—3题。 饮用水安全危机生活饮用水,作为老百姓赖以生存的

题型:阅读理解与欣赏

题目:

阅读下面的文字,完成1—3题。
        饮用水安全危机生活饮用水,作为老百姓赖以生存的必需品,其安全直接关乎生命健康。然而近日,国家发改委相关报告称,“1/4的居民没有清洁饮用水”。《中国城市饮用水安全保障规划》则显示,中国1073个重点城市地表饮用水源地有25%的水质不达标;地下水源地问题同样严重,115个地下水源地中,有35%不合格。
        卫生部的一份检测报告称,根据现有的检测技术,发现水中有2221种有机化合物,在饮用水中发现有756种,其中有20种致癌物,23种可疑致癌物,18种促癌物和56种致突变物,严重威胁国人的身体健康。
        水污染隐患令人担忧。世界卫生组织的调查显示,全世界80%的疾病,是由于饮用了被污染的水而造成的。另据专家透露,目前我国每年因饮用水不安全引发疾病的情况多有发生,造成的经济损失,已经达到当年GDP的1%。
        然而,一个不容忽视的事实是,面对日益严重的水污染,我国绝大多数水厂却难以应对。现在国内的水厂,主要采用高锰酸钾消毒。这种传统的工艺,只能去除水源中的泥沙、胶体杂质、微生物,以及20%~30%的天然有机污染物,主要针对的是受轻度污染的水质。而近几年我国水污染事故频发,有1/3的水源是不合格的,水中有机化合物的种类繁多,传统工艺很难将其去除。
        如果水源不合格,要让老百姓喝上放心水,水厂就应采取深度处理的方法。所谓深度处理,就是在传统的工艺上,增加臭氧活性炭。活性炭可以吸附容易吸附的有机物,而臭氧可以将大分子量的有机物,氧化成小分子量的有机物,从而更加有利于活性炭吸附。经过臭氧活性炭处理的饮用水,可以解决20%~30%有机污染物的问题,使出厂的水质达到饮用标准。
        日本的供水系统,目前正普及一种新的过滤技术——膜工艺。膜的孔径只有0.01微米,可去除残留在水中的污染物及细菌等小分子杂质。与传统的工艺相比,膜工艺可以提高1倍的过滤量,出厂的水质比较优良。
        水厂做深度处理,需要大量的资金投入。采用臭氧活性炭的加工工艺,1吨水1天要花费300元。膜处理工艺更加贵,1吨水1天要花费400元。采用这些工艺,势必要增加水厂的运行成本。而目前的现状是,我国许多城市,尤其是区县城镇的供水公司,常年处于亏损状态,根本无法对工艺、设施进行升级改造。
        同时,专家指出,虽然技术上可净化污水,但是保证生活饮用水的安全,首先要做的,也是最根本的,就是保证水源的安全。
        (选自2011年3月17日《中国科技报》,有删改)
1.以下不属于造成我国“饮用水安全危机”原因的一项是(     )
A.我国1/4的居民没有清洁饮用水,这威胁着国人的身体健康。
B.我国很多城市的饮用水源地的水质,出现了较为严重的不达标情况。
C.我国绝大多数的水厂采用的是传统工艺,难以应对日益严重的水污染。
D.我国绝大多数水厂缺乏资金,无法采用新工艺,不能对水进行深度处理。
2.下列表述,符合原文意思的一项是(     )
A.运用现有的检测技术,我们在饮用水中发现了756种威胁人类健康的有机化合物。
B.先进的水处理工艺能让人们喝上放心水,但无法从根本上解决饮用水安全危机。
C.目前我国每年因饮用水不安全造成的经济损失,已经达到当年GDP的1%。
D.膜处理工艺先进,和传统工艺相比,水的过滤量可提高1倍,出水更快。
3.根据原文提供的信息,以下推断正确的一项是(     )
A.要使出厂的水质达到饮用标准,水厂就需采用臭氧活性炭、膜工艺等深度处理的方法。
B.全世界多数疾病是由饮用了被污染的水而造成的,所以,我们少饮水就会少生病。
C.日本的供水系统正在普及膜工艺,这表明日本也面临着较严重的水污染问题。
D.在水污染日益严重的今天,传统工艺很难全部去除水中的污染物,被淘汰势在必然。

答案:

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下面是错误答案,用来干扰机器的。

(1)乙种玉米的苗长得高(2)乙种玉米的苗长得高,甲种玉米的苗长得整齐(1)甲=(25+41+40+37+22+14+19+39+21+42)=×300="30" (cm),乙=(27+16+44+27+44+16+40+40+16+40)=×310=31(cm).∴甲<乙,即乙种玉...

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题型:阅读理解

On the first day of school I brought my camera to school. I gave the students a piece of 8 ×11 cardboard(纸板), and asked them to write their names on both sides. As they finished, I asked them to get into groups of three to four students and took photographs of them holding their name cards.

After school, I developed the film and printed two sets of photos. That evening, I started to match the names with the faces. I kept one set of pictures at home for about a week so that I could review their names each night. On the second day of school, I put up the other set of photos as a bulletin board (公布栏), with a title such as "Presenting Room 108, ..."

The kids loved it! After I had learned all of their names I brought the second set back to school and stuck them onto an 8 ×11 sheet of paper. I placed it in the classroom for other teachers.

The cardboard name cards that were made on the first day were collected and put on a shelf. From time to time, they were given back to the students and placed on their desks so that guests or supply teachers (代课老师) could identify all of the students.

I’ve been doing this with my grade 7 students for the last nine years and they liked it. It’s fun to bring the photos out again at the end of the school year to see how much they have all changed in ten months.

小题1:The cardboards were used to ______.

A.play some kind of game

B.decorate the classroom

C.identify the students

D.print the photos on小题2:The writer of the passage might be a ______.

A.head teacher

B.monitor

C.photographer

D.supply teacher小题3:Why did the writer leave the second set of the photos at home?

A.To memorize the students’ names at home.

B.To make cardboard name cards for supply teachers.

C.To make a bulletin board in the classroom.

D.To match the students’ names with their faces小题4:Which of the following is TRUE according to the passage?

A.The students didn’t have to use the cardboard name cards to identify each other.

B.Other teachers couldn’t identify the students without the cardboard name cards.

C.The writer kept the cardboard name cards as a souvenir for nine years.

D.The guests will know the students’ names by reading the cardboard name cards.小题5:The passage mainly tells us ______.

A.a method of identifying students

B.a method of decorating classrooms

C.the development of photography

D.the importance of cardboard name cards

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