问题 填空题

水与人类的生活和生产密切相关.2010年“中国水周”的宣传主题是“严格水资源管理,保障可持续发展”.为响应这一主题,某中学环保小组的同学配合环保部门,定期对流经我市的马颊河河水进行取样测试.请根据某日采集的水样回答以下问题:

(1)除去水样中难溶性的固体,需将水样(填序号)______;

①加热    ②过滤    ③蒸发   ④冷却

(2)简述用PH试纸测定河水PH的具体操作______.经测定河水PH大于7.

(3)由上述数据分析,该河水的主要污染物可能是(填序号)______;

①带有酸臭味的城市生活污水         ②化工厂排放的污水

(4)为了保护马颊河的水质,下列做法合理的是(填序号)______.

①抑制水中所有动、植物的生长       ②不任意排放工业废水

③禁止使用农药和化肥               ④生活污水经过净化处理后再排放.

答案

(1)过滤是把不溶于液体的固体与液体分离的一种方法,通过过滤可除去水样中难溶性的固体.

(2)用pH试纸测定河水pH时,用干燥洁净的玻璃棒蘸取河水,涂在pH试纸上,带起变色后,与标准比色卡对照,即可测得河水pH值.

(3)根据(2)的结论可知,河水pH大于7,溶液显碱性;带有酸臭味的城市生活污水和未经显酸性,不符合要求;该河水的主要污染物可能是化工厂排放的污水

(4)①抑制水中所有动植物的生长,不能保持生态平衡,不能防止水污染,故选项说法错误.

②工业生产中的废水会造成水体污染,不任意排放工业废水,能避免水污染,故选项说法正确.

③农药和化肥可以提高农作物的产量,禁止使用农药和化肥,对农业生产不利,应合理施用,故选项说法错误.

④生活污水会造成生活污染,经过处理再排放,能避免水污染,故选项说法正确.

故答案为:(1)②;(2)用干燥洁净的玻璃棒蘸取河水,涂在pH试纸上,带起变色后,与标准比色卡对照,即可测得河水pH值;(3)②;(4)②④.

单项选择题
阅读理解

E

Some recent reports on the death penalty have brought some interesting responses from

readers all over the country. Although I really don’t like to make fun of people who oppose the

death penalty because they are so sincere, I wish they would come up with some new arguments to

replace the worn-out ones.

For example, many said something like this : “Wouldn’t it be better to keep the killers alive so

psychiatrists(精神科医生)can study them in order to find out what makes them the way they are?”

It takes the average psychiatrist about five years to figure why a guy wants to stop for two drinks after work and won’t quit smoking. So how long do you think it will take him to determine why somebody with an IQ of 92 decided to murder the little old lady who lives next door? Besides, we have a huge number of killers in our prisons—more than enough to keep all the nation’s psychiatrists busy for the next 20 years.

Another standard is: “The purpose of the law should be to protect society, not to give cruel punishment, such as the death penalty.”

In that case ,we should tear down all the prisons and let all the criminals go because most people would consider a long period in prison to be cruel punishment--especially those who are locked up. Even 30 days in the Cook County Prison is no picnic.

And: “What gives society the right to take a life if an individual can’t?” The individuals who make up society give it that right. Societies perform many functions that individuals can’t. We can’t carry guns and shoot people, but we give that right to police.

Words can not explain the suffering the families of murder victim are left to live with. The families suffer a terrible loss, and they live with terrible memories. The knowledge that the killers are alive and will probably remain alive and cared for you by society is extremely painful. Probably, people who oppose the death penalty should try explaining to these people how cruel it is to kill someone.

72.What’s the writer’s attitude towards death penalty?

A.Death penalty is a must.

B.Death penalty doesn’t solve all the problems.

C.Death penalty should be practiced more carefully.

D.Death penalty should only be used on murderers.

73.How many arguments against death penalty are discussed in the passage?

A.Two  B.Three       C.Four  D.Five

74.What does the last sentence of the text suggest?

A.It’s cruel to use death penalty to kill someone.

B.Murder victims need more comfort from the society.

C.Opponents of death penalty should offer explanations.

D.Murderers should be put to death as the punishment.

75.The author develops the passage by         .

A.providing typical examples of death penalty

B.following the natural time order

C.presenting and analyzing ideas

D.comparing opinions from different fields