题型:阅读选择 题类:真题 难易度:困难
四川省广元市2021年中考英语真题试卷
A small cloud moves slowly through the air in a hospital operating room (手术室). In the room a patient with cancer(癌症), lies on a table. The cloud is all around the patient, covering her body and filling her lungs(肺). The cloud is not smoke. It is made of millions of nano—robots(纳米机器人). These tiny robots move from cell (细胞) to cell in the patient's body, killing the cancer.
Fighting cancer with nano—robots is only an idea today, but scientists say that it could be possible in the future. Using nano—robots for good purposes such as fighting the illness or repairing the environment may be the way to many of today's problems.
However, nano—robots could be a dangerous risk as well. Because nano—robots are so tiny, they will have to work in large teams of many thousands to many millions. For this reason, nano—robots will have to be programmed(被编程)to build themselves. Scientists will not have the ability to build millions of nano—robots one by one.
This ability to re—produce is making some scientistic worried. What will happen if something goes wrong in the programming? Quite a lot of crazy nano—robots would be far worse than any illness. Some people think that if they get out of control, nano—robots could make the Earth gone.
What should be done? Should we continue researching nano—robots or should we search for other methods? This is one of the many difficult decisions that we have to make in the future.
Playing with apps on smart phones is very common among young people. Let's try some special apps and enjoy them.
Butter Camera In this app, there are many filters(滤镜)that can make your photos more beautiful. But the coolest thing is that it can help you add pretty and artistic characters. The characters can be anything you like. They can be your own words, famous sayings or even a poem. You can make a photo diary that shows your feelings. |
TaoMix 2(自然之声2) Once in a while, you may feel tired after a busy school day. Why not try this app? This is a music app. But the sounds in it all come from nature. There are over 100 sounds of nature, such as birdcalls, wind and rain. You can hear all these sounds. The best thing is that you can create your own music by recording other sounds you like, for example, the sound of your own laughter. |
Beaker(烧杯) Is chemistry your favorite subject? With this app, your smart phone turns into a beaker. You "pour" chemical materials by touching the upper right-hand corner of your smart phone. You "light" a match by swiping the screen quickly. You can shake the "beaker" to make chemical reactions go faster. There are 300 chemical reactions in all. |
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