题目内容
Scientific experiments __________ by students without the teachers’ instructions can be dangerous.
A. carry out B. carrying out C. carried out D. carrying
名师导航单元期末冲刺100分系列答案
名校名卷单元同步训练测试题系列答案When I was small and my grandmother died, I couldn’t understand why I had no tears. But that night when my dad tried to cheer me up, my laugh turned into crying.
. So it came as no surprise to learn that researchers believe crying and laughing come from the same part of the brain. Just as laughing has many health advantages, scientists are discovering that so, too, does crying.
Whatever it takes for us to reduce pressure is important to our emotional (情感的) health, and crying seems to study found that 85 percent of women and 73 percent of men report feeling better after crying.
Besides, tears attract help from other people. Researchers agree that when we cry, people around us become kinder and friendly and they are more ready to provide support and comfort. Tears also enable us to understand our emotions better; sometimes we don't even know we' re very sad until we cry. We learn about our emotions through Crying, and then we can deal with them.
Just as crying can be healthy, not crying — holding back tears of anger, pain or suffering — can be bad for physical (身体的) health, Studies have shown that too much control of emotions can lead to high blood pressure, heart problems and some other illnesses. If you have a health problem, doctors will certainly not ask you to cry. But when you feel like crying, don't fight it. It's a natural — and healthy — emotional response (反应).
【小题1】Why didn't the author cry when her grandmother died?
| A．Because her father did not want her to feel too sad. |
| B．Because she did not love her grandmother. |
| C．Because she was too shy to cry at that time. |
| D．The author doesn’t give the explanation. |
| A．Crying is the best way to get help from others. |
| B．Fighting back tears may cause some health problems. |
| C．We will never know our deep feelings unless we cry. |
| D．We must cry if we want to reduce pressure. |
| A．Power of Tears |
| B．How to Keep Healthy |
| C．Why We Cry |
| D．A New Scientific Discovery |
Archaeology as a profession faces two major problems. It is the poorest of the poor. Only small sums are available for excavating(挖掘)and even less is available
for publishing the results and preserving the sites once excavated. Yet archaeologists deal with priceless objects every day. Besides, there is the problem of unlawful excavation, resulting in museum-quality pieces being sold to businessmen at the highest price..
I would like to make a suggestion that would at once provide money for archaeology and reduce the amount of diggings against law. You might say that professionals excavate to get knowledge, not money. Moreover, ancient artifacts(古器
物) are part of our global cultural heritag
e(遗产), which should be there for all to appreciate, not sold at the highest price. I agree. Sell nothing that has scientific value. But, you might reply, everything that comes out of the ground has scientific value. Here,
we disagree. In theory, you may be correct in saying that every artifact has hidden scientific value.
People can not help appreciate every unearthed treasure but there is not enough money even to put the finds in good order; as a result, they cannot be found again and become as inaccessible as if they had never been discovered. Indeed, with the help of the Internet, sold artifacts could be more reachable than are the pieces stored in museum basements. Before sale, each could be photographed and the list of the purchasers could be maintained on the computer. A purchaser could even be required to agree to return the piece if it should become needed for scientific purposes.
【小题1】What’s the problems that archaeology as a profession has to face?
| A．Money and unlawful excavation | B．Effectively duplicates. |
| C．Scientific purposes. | D．Excavation law. |
| A．putting them in the museum | B．having sold artifacts returned |
| C．making use of the Internet | D．solving the money problem |
| A．No selling of any unearthed ancient artifacts. |
| B．Some money should be raised for the purpose. |
| C．Selling some unearthed ancient artifacts and having them returned when needed. |
| D．Ancient artifacts, our global cultural heritage, should be evenly shared by us all. |
It is often said that man has become the enemy of our planet. This is no exaggeration(夸张), for reports show that man’s greed has done much to destroy the earth. Man, in his greedy desire for financial growth, has polluted the air, land and water, and has robbed our valuable natural resources. Man’s industrial plants pour out poisonous waste that pollutes the sea and puts life in the sea under the threat of dying out; at the same time, they release alarming amounts of carbon dioxide, chlorofluorocarbons (CFCs) and other pollutants. Small wonder that the air now is much warmer and more impure than ever before.
Of course, this is not just because of man’s greed—it is man’s pressing need as well. For instance, in developing countries, huge financial foreign debts have forced governments to approve the cutting of forests for agriculture or ranching. As a result, forests are cut down just to meet man’s immediate needs.
Perhaps unknowingly，man has changed the make-up of the earth's atmosphere. Scientific studies have shown that CFCs used in refrigerators and industrial cleaners are fast destroying the ozone layer—a protective layer in the atmosphere that protects us against the harmful effects of the sun’s ultraviolet (紫外线)rays. In fact, documented reports have shown a terrible fact that there are “holes” in the ozone layer over the Antarctic. And they appear to be expanding.
Faced with these environmental problems, world leaders have shown deep concern. The UN Environmental Programme (UNEP) has arranged international agreements like the Vienna convention of 1985 and the Montreal Protocol of 1989 to preserve the ozone layer by controlling the production, use and trade of destructive chemicals.
There may be some doubt as to how effectual these agreements may be, given that some countries still maintain an “I-don’t-care” attitude. Their attitude is probably due to their failure to grasp the importance of the problem. Then, there is no doubt that environmental education on an international scale（规模）is greatly needed, so that all countries, great and small—the “haves” and the “have nots”—may realize their responsibilities for our planet.
In the meantime, the UNEP seems to have taken steps in the right direction, and it is hoped that in the not so distant future, all nations of the world will join hands in saving mother earth.
1.Which of the following is a reason for the cutting and burning of forests?
A. To build houses for more population.
B. To have land for agriculture.
C. To export trees to other countries.
D. To build industrial plants.
2.The holes in the ozone layer are largely due to________.
A. man’s research activities B. the greenhouse effect
C. the ultraviolent D. harmful chemicals
3.Why don’t some countries care about the problem of the environment?
A. They don’t want to put their lives in danger.
B. They just don’t know how to solve the problem.
C. They haven’t realized the seriousness of the problem.
D. They don’t want to break their international commitment.
4.What is the author’s attitude towards the future of the environment?
A. Hopeful. B. Unconcerned C. Doubtful D. Objective