题目内容
①Some days, don’t you think, “Wouldn’t it be nice if the clothes just washed itself?” Self-cleaning clothes may sound crazy. But Australian researchers have found a way to make something like this possible!
②A team at RMIT University in Melbourne, Australia, found a way to put special nanostructures (纳米结构) into clothing, which can then clean the clothes. When sunlight hits the nanostructures, they break down the dirt and marks that don’t belong on your clothes.
③The nanostructures don’t break down the real clothing because cotton and the other clothing materials are too strong to break down. According to CNN, the researchers cover the clothing in a solution made of silver and copper(铜) nanostructures. All it takes is 40 minutes of sunlight and your clothes will look as good as new.
④So if you spill on yourself during lunch, you can step outside for a walk, and it will be clean by the time you go inside. It not only makes your life easier, but it can also be good for the environment.
⑤According to the US Department of Energy, washing a piece of clothing uses about 25 gallons of water. Water is a very important resource, so using less of it to wash clothes is better for the environment. But one of the scientists at RMIT University knows more needs to be done.
⑥“There’s more work to do before we can start throwing out our washing machines,” said Dr Rajesh Ramanathan, “but this is a strong foundation(基础).” So what’s the next step? Ramanathan wants to either start selling the solution by itself or asking clothing makers to treat(处理) the clothing with the solution while clothes are being made.
1.According to the first three paragraphs, _____.
A. the self-cleaning clothes are easily worn out
B. the clothes will be covered with silver and copper after self-cleaning
C. people can use the self-cleaning clothes on rainy days
D. the nanostructures can break down dirt and marks on clothes
2.What does the underlined word “solution” in Paragraph 3 mean?
A. 方案 B. 溶液 C. 水盆 D. 模型
3.What do Paragraphs 4 & 5 talk about?
A. How the self-cleaning clothes are made.
B. How the self-cleaning clothes work.
C. What advantages the self-cleaning clothes have.
D. What helps the self-cleaning clothes work.
4.From the passage, we learn that _____.
A. it’s time to throw out our washing machines
B. the solution sells well
C. clothing makers like the solution
D. the solution is not on sale yet
5.We might read the above passage in ________.
A. a fashion book B. a guide book
C. a science magazine D. a newspaper advertisement.
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Teachers say the digital (数字的) age has had a good and a not-so-good influence on the American teenagers. More than 2,000 high school teachers took a survey on the Internet.
75 percent of the teachers said the Internet and digital search tools have had a “mostly good” use for their students' research habits and skills. But 87 percent agreed that these technologies "make the students not have enough attention.” And 64 percent said the technologies “do little to help them in courses.”
Judy Buchanan is a director of the National Writing Project. Ms. Buchanan says digital research tools are helping students learn more, and learn faster. Teachers really like these tools, because they are ways to make some of learning very exciting. Young people enjoy using these tools. And the goal is to help them do creative work, and not just that kind of copyist (模仿者，抄写员).
But one problem is that many students don't have a good understanding of how to use the digital knowledge well. In other words, they trust too much of the information. Judy Buchanan says these students have not developed the skills they need to tell whether the information on the Internet is good or bad.
Another problem is something that might not seem like a problem at all, being able to quickly find information from the Internet. Teachers say the ability of their students to work hard to find answers is becoming weaker. They say students depend too much on search engines and do not make enough use of printed books.
Besides, many teachers are also worried about the problem that the Internet makes it easy for students to copy work done by others, instead of using their own abilities.
The survey on whether digital age 1. American teenagers
Purpose | Students should learn how to use the digital tools in a right way. |
Different opinions | ● Three 2. of the teachers thought the Internet had a mostly good use for students’ research habits and skills. ● 87% of the teachers agreed technologies may 3. students from having enough attention. ● 64% said that the technologies are almost 4. to them in courses. |
Advantages of digital tools | Digital tools help students learn more and learn faster. ● Teachers think learning by using digital tools makes students feel very 5. . ● Young people also think they can finish their work 6. . |
7. | ● Many students have not developed the skills they need to tell whether the 8. information is good or bad. ● Many students 9. too much on search engines and do not make enough use of printed books. ● Internet makes it easy for students to copy 10. work, instead of using their own abilities. |