题目内容
Don’t have horse ______ too fast, it will get tired soon.
- A.ran
- B.to run
- C.runs
- D.running
have sb./sth. doing sth.让一直做某事，或者让某物一直处于某种状态。
优质课堂快乐成长系列答案The website “FarmersOnly.com” calls itself an online dating and friendship finder. The idea started in the mind of a man, Jerry Miller in Ohio. He wondered how farmers could meet new people who understand the life of a farmer. Jerry Miller is not a farmer but he represents a lot of farmers.
As he tells it, the idea for the site was planted when a farmer told him one day that she was recently divorced and would like to date. But someone would invite her to meet for coffee at nine o’clock at night, when she had to start her day at five the next morning.
So, in 2005, Jerry Miller launched his website. “You don’t have to be a farmer to be on FarmersOnly.com, but you do have to have the good old-fashioned traditional values of America’s Heartland.”
You also have to live in the United States or Canada to be a member of the site. Some services are free, but a full membership costs fifty dollars for a year. As of last week the site listed more than 58,000 members. Many of them are farmers in the United States. Others are students or workers involved in some way with agriculture. Jerry Miller tells us about thirty marriages in the last year have resulted from his website.
Some farmers have also found love through a group, Singles in Agriculture, which was formed as a nonprofit organization in 1986. It organizes gatherings that usually end with a dance, but is not a dating service. The purpose is to support educational and social activities that offer people a chance for friendsh
ip. Its website, singlesinag.org, says there are more than 1,000 members across the nation and as far away as France.
【小题1】Jerry Miller started singlesinag.org in order to .
| A．help farmers | B．represent farmers |
| C．support traditions | D．understand farmers |
| A．It provides dating services. |
| B．Only farmers can become its members. |
| C．Its services are free. |
| D．Farmers in France can’t benefit from it. |
| A．advertise for the two websites |
| B．urge readers to help farmers |
| C．intro duce two websites |
| D．encourage social activities |
| A．farmers are easy to meet new people |
| B．the Internet helps improve farmers’ social life |
| C．all farmers desire marriage |
| D．more farmers get divorced in the USA |
What will power your house in the future? Nuclear, wind, or solar power? According to scientists at the Massachusetts Institute of Technology (MIT) in the US, it might be leaves –but artificial ones.
Natural leaves are able to change sunlight and water into energy. It is known as photosynthesis (光合作用). Now researchers have found a way to imitate this seemingly simple process.
The artificial leaf developed by Daniel Nocera and his colleagues at MIT can be seen as a special silicon chip (硅片) with catalysts (催化剂). Similar to natural leaves, it can split water into hydrogen and oxygen when put into a bucket of water. The hydrogen and oxygen gases are then stored in a fuel cell (电池), which uses those two materials to produce electricity, located either on top of a house or beside the house.
Though the leaf is only about the shape of a poker card, scientists claimed that it is promising to be an inexpensive source of electricity in developing countries. “One can imagine villages in India and Africa not long from now purchasing an affordable basic power system based on this technology,” said Docera at a conference of the American Chemical Society.
An artificial leaf is not a new idea. The first artificial leaf was invented in 1997 but was too expensive and unstable for practical use. The new leaf, by contrast, is made of cheap materials, easy to use and highly stable. In laboratory studies, Nocera showed that an artificial leaf prorotype (原型) could operate continuously for at least 45 hours without a drop in activity.
The wonderful improvements come from Nocera’s recent discovery of several powerful new, inexpensive catalysts. These catalysts make the energy transformation (转换) inside the leaf more efficient with water and sunlight. Right now, the new leaf is about 10 times more efficient at carrying out photosynthesis than a natural one. Besides, the device can run in whatever water is available; that is, it doesn’t need pure water. This is important for some countries that don’t have access to pure water.
With the goal to “make each home its own power station” and “giving energy to the poor”, scientists believe that the new application could be widely used in developing countries, especially in India and rural China.
【小题1】Which of the following order correctly shows how the artificial leaf is used to produce electricity?
a. artificial leaves split water into hydrogen and oxygen
b. the hydrogen and oxygen gases are stored in a fuel cell
c. the artificial leaves are put in water
d. the fuel cell uses hydrogen and oxygen to produce electricity
| A．cbad | B．cabd | C．bcad | D．cadb |
| A．They are inexpensive but unstable. |
| B．They are as efficient at carrying out photosynthesis as natural leaves. |
| C．They can work only in pure water. |
| D．They need several catalysts to help them work efficiently. |
| A．build-up more power stations in the world |
| B．provide cheaper energy for developing countries |
| C．offer people in developing countries access to pure water |
| D．gain a deeper understanding of the photosynthesis process |
| A．Introduction to the history of artificial leaves. |
| B．An invention copying photosynthesis. |
| C．Giving energy to the poor. |
| D．A mixture of water power and solar energy. |
There are some special traditions in Hawaii .People are very friendly and always welcome visitors. They give visitors a lei,a long necklace made of beautiful fresh flowers. Men wear bright flowered shirts and women often wear long flowered dresses. There are traditional Chinese ,Japanese and Fillipino holidays and all the holidays from the United States. They call Hawaii the Aloha State. Aloha means both hello and good-bye. It also means “I love you”.
Usually when people from different countries,races and traditions live together,there are serious problems. There are a few problems in Hawaii ,but,in general,people have learned to live together in peace.
Hawaiians get most of their money from travelers,and most of the travelers come from the mainland and from Japan. There are so many peole living in Hawaii now that there are residential（居住的） areas where there used to be farms. Some of the big sugar and apple companies have moved to the Philippines,where they don't have to pay workers as much money. The families of the first people who came from the US mainland own the important banks and companies. Japanese are also buying or starting business.
【小题1】What might be the best title for this text?
| A．Hawaii ,the Aloha State | B．Living Hard Together |
| C．The Flower of Hawaii | D．The Problems of Hawaii |
| A．a friendly and welcome way |
| B．a long necklace made of beautiful fresh flowers |
| C．a bright flowered shirt |
| D．a long flowered dress |
| A．we should all go to Hawaii to work |
| B．it is possible to learn to live together in peace |
| C．it is not likely to live together in peace |
| D．Hawaii is the only place where there is peace |