问题 选择题

页岩气是一种以游离或吸附状态埋藏于致密的页岩层或泥岩层中的非常规天然气,下图为页岩气埋藏构造示意图,据此完成下列各题。

小题1:图中页岩气与常规天然气相比

A.受页岩油挤压,埋藏更深

B.游离性更强,开采难度更小

C.埋藏于断裂带,岩层裂隙发育更高

D.分布于向斜槽部,有自生自储条件小题2:对页岩气的大规模开采使用可以

A.改变地表形态,并导致地面沉降

B.减少对石油的依赖,低碳效益明显

C.导致地下水污染,地下水循环更活跃

D.改善大气环境质量,降低二氧化碳浓度

答案

小题1:D 

小题2:B

题目分析:

小题1:页岩气是一种非常规天然气,其产生和储存条件等就常规天然气不同,解答该问题必须依据的是题中所给信息,而不能受常规天然气的相关知识影响。从页岩气埋藏构造示意图中得出,页岩气埋藏深,并非受到页岩油的挤压导致,A项错误;若页岩气游离性更强,会加大开采的难度,B项错误;图中无断裂构造。C项错误;图中页岩气集聚在向斜的槽部(底部),有自生自储条件,D项正确。

小题2:页岩气是主体上以吸附或游离状态存在于泥岩、高碳泥岩、页岩及粉砂质岩类夹层中的天然气,其大规模开采使用不会改变地表形态,不会导致地面沉降,不会导致地下水污染,A、C项错误;页岩气的大量使用,同样不会降低二氧化碳的浓度,D项错误;页岩气的大量使用,可以改变能源消费结构,降低对石油的依赖,相比较石油的使用来说,排放的二氧化碳量要少,所以B项正确。

选择题
阅读理解

阅读理解。

     In many countries the standard of living enjoyed by their people has increased rapidly in recent years.

Sadly, not everyone in these countries is so fortunate and many people in rich countries are homeless.

     The reasons for homelessness are various, but poverty (贫穷) is undoubtedly one of the main causes.

The homeless people may have become jobless and then been unable to pay their rent and so no longer

have a roof over their heads. Often, the fact that unemployed people get help from the government prevents

this from happening, but not always.

     Some homeless people are mentally ill and have no one to look after them. Some are young people who,

for one reason or another, have left home and have nowhere to live. Many of them have had a serious

disagreement with their parents and have left home, choosing to go to a city and live on the streets. Sometimes

they have taken such action because they have been unable to get on with a step-parent.

     Many homeless people get into the habit of begging to get enough money to stay alive, but many of the

general public refuse to give anything to beggars. Often they are moved on by the police, being accused (指

控), whether rightly or wrongly, of forceful begging. There are many who disrespect homeless people.

     Some cynics (愤世嫉俗的人) declare that homeless people choose to live the life which they lead. But

who would willingly choose to live in z shop doorway, under a bridge or in a cardboard box?

1. According to the text, what causes some people to be homeless?

A. Lack of money.

B. The increased standard of living.

C. No government help.

D. Agreement with their parents.

2. It can be inferred from the text that _____.

A. the homeless are willing to live under a bridge or in a cardboard box

B. you will not find homeless people in countries with a high standard of living

C. the mentally ill live on the stress because they want the company of other homeless people

D. the unemployed who receive help may still be among the homeless

3. In paragraph 2, "a roof over their needs" most probably means _____.

A. a cap

B. a car

C. a home

D. a covering

4. The author thinks that the homeless people are _____.

A. pitiful

B. troublesome

C. respectable

D. admirable