Elijah McCoy(1843-1929) was on the right track when he came up with his oil-dripping cup. The device kept engines oiled so trains don’t need to stop to keep from overheating.

John Lee Love was a sharp guy. He invented a type of pencil sharpener so he didn’t have to use a knife to perfect his pencil’s point. He patented the device in 1897.

Charles Drew (1904-1950) came up with a great idea for saving lives.He figured out a way to preserve blood .His idea for blood banks has helped countless people.

Patricia Bath (1942-) created a device that made eye surgery(手术) safer and faster. The first African American female doctor to get a patent also started an eye institute in 1976.

You’d better not forget Madam C.J.Walker (1867-1919)! She dreamed up a product to regrow hair .The dream cream made her millions of dollars.

21.Who made a contribution public transportation? A. Levis Latimer B. George Washiongton Carver C. Elijah McCoy D. John Lee Love

22.Whose inventions were of great significance to medical science? A. Thomas L. Jennings’s﹠George Crum’s

B. George Washiongton Carver’s ﹠ Elijah McCoy’s C. Charles Drew’s﹠Patricia Bath’s D. Madam C.J.Walker’s ﹠Lewis Latimer’s 23.The passage is written_______ . A. to introduce some important inventions . B.in honor of African Americans inventors. C.to remind readers to respect African Americans.

D. to tell readers how to come up with innovative ideas.

B

Lindsay Binegar of Greenfield, Ohio,made her first $100 at the age of four, when she won a prize for showing a pig from her family’s farm to the local 4-H Club. Most kids would be thrilled to spend that money on toys,but not Lindsay.\didn’t get the money; it went to the bank,\she told The Columbus Dispatch.

Over the years, Lindsay kept on raising and showing pigs, and kept on winning prizes. Some were $ 100 for small wins, but she won thousands of dollars for championship prizes at county fairs. Before long, she earned an impressive amount of cash — but, aside from a purse when she was 14, Lindsay had never spent a dollar of her savings. By the time she was 18, she had got more than $ 40,000, which she planned to put towards her college education at nearby Ohio University.

But her parents said that if she continued living at home while attending school, they wouldn’t have to pay for her dorm housing, and would be willing to cover the entire cost of her education. It sounded like a good deal to Lindsay. But what should she do with her savings?

Her father had an idea:buy a house, just as he’d done when he was young. He used the house’s sale to help him buy the family farm where Lindsay had grown up and raised all those lucrative(赚大钱的)pigs. Lindsay was able to buy a house in Greenfield, paying for the entire purchase in cash. She did a bit of painting and then rented it out for $ 450 a month.

After finishing college,Lindsay plans to marry Heath McNeal, and use the income from her house to buy a block of land and build a new house. But she’ll never move too far from home. \in Greenfield,\

At her current rate, she’ll probably be the town’s biggest real estate tycoon(房地产大亨)by the age of 25.

24.Lindsay earned her $40,000 by _____ .

A. selling pigs B. running a farm

C. buying and selling D.Taking pigs to enter competitions 25.What was Lindsay’s original plan for her $40,000 ?

A. To buy more pigs. B.To buy a large house.

C.To pay the cost of her education. D.To hold a special wedding ceremony. 26.What do we know about Lindsay’s parents ? A. They lived a poor life.

B. They helped Lindsay manage her money. C. They didn’t have a house of their own. D. They wanted their daughter to move out.

27.We can inter from the passage that______ . A. Lindsay will become a real estate agent B. Lindsay will buy a new house in another city. C. Lindsay is good at investing her money.

D. Lindsay graduated from Ohio University with high marks.

C

Researchers are looking into new ways to generate efficient photovoltaic energy (光伏能源) and for this they have been inspired by the v-shaped posture of the Cabbage White butterfly.

Photovoltaic energy is the science behind solar power, where light is turned into electricity. It is a two-set process. Step one is a photoelectric effect, caused by sunlight. The second step is an electrochemical process, which generates an electric current.

To improve the collection of sunlight, a research group has been inspired by the resting posture of the Cabbage White butterfly. The species has a natural range across Europe, Asia, and North Africa. To many farmers, the butterflies are regarded as a pest; to others, they are pretty to look at. To one research group the butterflies are an inspiration.

The butterfly adopts a v-shape in order to heat up its flight muscles before taking off. By creating solar panels(太阳能电池板)in this formation，scientists think that the quantity of power that a solar panel can produce can be increased by around 50 percent.

The Cabbage White butterfly is different to many other butterflies in using the v-formation. On cloudy days butterflies need to wait to receive enough sunlight in order to fly. However, by using the v-posture, the Cabbage White butterfly is able to absorb more energy more quickly than other butterflies. In addition, the butterfly can reflect sunlight from its wings, which allows its flight muscles to be warmed to an ideal temperature.

The new research was conducted at the University of Exeter's Environment and Sustainability Institute (ESI) and the Centre for Ecology and Conservation. Discussing the findings with Laboratory Manager magazine, lead researcher Professor Tapas Mallick stated :\（仿生学）in engineering is not new. However, this research shows pathways to develop low cost solar power that have not been done before. \28.Which can be the best title for the text?

A. The future of solar power B. The butterfly effect theory

C. Cool things about the Cabbage White butterfly D.Butterflies contribute to solar power revolution

29.What posture of the Cabbage White butterfly is being adopted by scientists? A. The flying posture. B. The resting posture. C. The take-off posture. D. The sleeping posture.

30.What is the main purpose of Cabbage White butterflies using the v-posture? A. To look prettier. B. To take a good rest. C. To prepare for flight. D. To protect themselves. 31.What is Tapas Mallick's attitude towards the research? A. Positive. B.Casual C. Skeptical. D.Disapproving. 32. Where is the text most probably taken from? A. A lesson plan. B. A book review. C. A science report. D. A personal diary.

D

The smell of dirty old socks leaves most people holding their noses. But scientists have discovered it is just the opposite for a certain pest. Researchers have found that the smell of old socks is actually extremely attractive to mosquitoes. Dr. Fredros Okumu, head of the research project at Tanzania's Ifakara Health Institute, plans to use this new information to develop a device that will attract and trap mosquitoes. He hopes this unusual method will help prevent and fight malaria （疟疾）．

Malaria is a disease that is spread by infected mosquitoes. The disease can spread easily and quickly. One mosquito carrying malaria can infect lots of people.

Malaria can be prevented and treated. But many African nations don't have the funds to fight it. While the global infection rate of malaria is continuing to drop, there are still over 220 million cases of malaria each year. Nearly 800,000 of these cases result in death, the majority of them being children in Africa.