问题 选择题

由于人类的活动,目前地球大气的二氧化碳浓度增高,产生温室效应,使地球温度有所提高,这将导致土壤沙漠化等恶果.导致二氧化碳浓度增高的主要原因是(  )

A.人口剧增,呼出二氧化碳增多

B.工业污染和自然资源的不合理利用

C.大量生物物种的灭绝

D.自然因素破坏了生态平衡

答案

二氧化碳气体具有吸热和隔热的功能.它在大气中增多的结果是形成一种无形的玻璃罩,使太阳辐射到地球上的热量无法向外层空间发散,其结果是地球表面变热起来.因此,二氧化碳也被称为温室气体.温室效应加剧主要是由于现代化工业社会燃烧过多煤炭、石油和天然气,这些燃料燃烧后放出大量的二氧化碳等污染物和自然资源的不合理开发和利用等造成的;其次人口的剧增,呼出二氧化碳增多,生态环境的破坏等降低了植物消耗二氧化碳,释放氧气的能力等,也是一方面的原因.物种的灭绝与此无直接关系.为减少大气中过多的二氧化碳,我们还可以通过植树造林,绿化草地,不践踏草坪等等行动来保护绿色植物,使它们多吸收二氧化碳来帮助减缓温室效应.可见B符合题意.

故选:B

阅读理解

阅读理解。

     Researchers have shown that music has an important effect on one's body and mind. In fact, there is a

growing field of health care known as Music Therapy, which uses music to treat diseases. Even hospitals

are beginning to use music therapy. This is not surprising, as music affects the body and mind in many

powerful ways.

     Researchers have shown that quick music can make a person feel more alert (警觉的), while slow music

can produce a calm, deep thinking state. Also, researchers have found that music can change brainwave

activity levels. This can help the brain to change speeds more easily on its own as needed, which means that

music can bring lasting benefits to your state of mind, even after you've stopped listening.

     Breathing and heart rate can also be influenced by music. This can mean slower breathing, slower heart

rate, and a relaxing response. This is why music and music therapy can help reduce the damaging effects of

long-term stress, greatly promoting not only relaxation, but health. Music can also be used to bring about a

more positive state of mind, by helping to keep worries away.

     Music has also been found to bring many other benefits, such as lowering blood pressure and reducing

the risk of strokes among others. It is no surprise that so many people are considering music as an important

tool to help the body become or stay healthy.

1. What can we know about music therapy? [ ]

A. It is a type of music.

B. It is a research about music.

C. It is a kind of disease affected by music.

D. It is a method of using music to help treat diseases.

2. According to the second paragraph, we can know that _____. [ ]

A. music with different speeds has different effects

B. quick music is not good for one's health

C. slow music can help one think more slowly

D. music will have less benefit after one stops listening

3. The reason why music can help deal with stress is that _____.[ ]

A. it is used by many hospitals

B. it can help change brainwaves

C. it is beneficial to breathing and heart rate

D. it can bring a more positive state of mind

4. The passage is mainly about _____. [ ]

A. the importance of music therapy

B. the benefits music can bring to treat diseases

C. a research on the effect of music

D. the diseases music can help to treat

单项选择题 A1型题