标准排球球网的长度为()。 A.9.50m B.9.25m C.9m D.10m

题型:单项选择题

问题:

标准排球球网的长度为()。

A.9.50m

B.9.25m

C.9m

D.10m

考点:中学体育与健康(初级)体育运动项目体育运动项目题库
题型:单项选择题

阅读下面的文字。

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)

小题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。小题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.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%。

C.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。

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。小题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。

题型:单项选择题

患者男性,40岁,急性发病,发病半日。 * * 窘迫疼痛,少腹拘急,腰部绞痛,便秘,曾排尿突然中断。舌质红,苔黄腻,脉弦紧数。

此患者应诊为()

A.腰痛

B.淋证石淋

C.腹痛

D.淋证气淋

E.淋证热淋

题型:单项选择题

Using it wisely, leisure promotes health, efficiency and happiness.

A.If it is used wisely

B.Having used it wisely

C.Because of its wise use

D.Because of usefulness

题型:单项选择题

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第三部分:阅读理解(共20小题,每题2分,满分40分)

请认真阅读下面短文,从短文后各题所给的A、B、C、D四个选项中,选出最佳选项.

  The three most valuable brand(商标)names on earth : Marlboro, Coca-cola and Budweiser, in that order.

  It’s interesting that of the three most valuable brand names on earth, NONE of them are good for you.

  Cigarettes kill 370,000 people a year in the U.S., not counting passive smoke. That’s over 1,000 people per day, equaling to five giant jets crashing daily. The estimates are that passive cigarette smoke kills over 15,000 people per year. That’s more than illegal drugs.

Coke is a solid company, but let’s face it, carbonated(含二氧化碳的) soft drinks of any brand are not healthy for you. There was a fellow parked in my driveway years ago. We were talking and he was drinking a cola. For some reason I had moved the cola and placed it on the hood (发动机罩) of his car.

  “Don’t put that drink on my car!” he shouted. “Don’t you know the acid(酸) in that drink will eat the paint off my car?” he said. He quickly took the drink and finished drinking it.

  The third most valuable brand in the world is a beer.

  It’s interesting what we value the most. You can’t control what the world values. You can only control what you value.

  What do you value? Is it really valuable?

  One method of determining what you really value is to try to do without it. If you can’t do it without it, then that’s what you value.

  Are you trying to get to the mountaintop with a cigarette in your mouth, a soda in one hand, and a beer in the other because those are the things that you can’t do without?

  Stop and think about your real treasures.“For where your treasure is, there will be your heart also ...”

56. According to the passage, Budweiser refers to____ .

 A. a kind of cigarette        B. a kind of soft drink

 C. a kind of paint           D. a kind of beer

57. How many people are killed by passive cigarette smoke per day?

 A. about 1,000       B. about 15,000      C. about 40         D. about 370,000

58. Why did the fellow take the cola and finish drinking it immediately?

 A. Because cola was good for his health.

 B. Because cola would damage the paint of his car.

 C. Because he was very thirsty then.

 D. Because he wanted to apologize to me.

59. What is the purpose of the text?

 A. To give advice on how to determine what you value most.

 B. To encourage people to give up smoking and drinking.

 C. To warn people not to believe advertisements.

 D. To tell people to have a clear mind about what is really valuable.

题型:单项选择题

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