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.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 |
Which of the following statements about new artificial leaves is TRUE according to the article?
| 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. |
The aim of the scientists at MIT in developing the new artificial leaves is to .
| 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 |
What is the main point of the article?
| 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. |
Banks view online banking as a powerful “value-added” tool to attract and keep new customers while helping to eliminate costly paper handling or teller（出纳员）interactions in an increasingly competitive banking environment .
Today , most large national banks , many local banks and credit unions offer some form of online banking , variously known as PC banking , home banking , electronic banking or Internet banking . Online banks are sometimes referred to as “brick-to-click” banks , both to tell them from “brick-to-mortar” banks that haven’t yet offered online banking , as well as from “virtual”（虚拟）banks that have no physical branches or tellers whatsoever .
The challenge（挑战）for the banking industry has been to design this new service channel in such a way that its customers will readily learn to use and trust it . Most of the large banks can now offer fully safe ,fully functional （功能的）online banking for free or for a small cost . As more banks succeed online and more customers use their sites , fully functional online banking will likely become as commonplace as automated teller machines (ATM).
Online banking has a lot of advantages . Unlike your corner bank , online banking sites never close; they’re at hand 24 hours a day , seven days a week , and they’re a mouse click away . If you’re out of state or even out of the country when a money problem appears , you can log on instantly to your online bank and take care of business . Online bank sites generally carry out and confirm （确认）deals at or quicker than ATM processing speeds . Many online banking sites now offer fashionable tools to help you manage all of your valuable items more effectively .
69．The word “eliminate” in the first paragraph probably means “___________”.
A．keep B．remove C．reduce D．improve
70．What is the challenge for the banking industry according to the text ?
A．To make online banking attractive . B．To open new services all over the world .
C．To offer online banking for free . D．To take care of business 24 hours a day .
71．From the text we can conclude that__________ .
A．“brick-to-click” banks are in fact another kind of physical banks
B．the function of a “brick-to-click” bank is as common as that of an ATM
C．a “ brick-to-mortar” bank is no better than a virtual one
D．customers can deal with their banking by a mouse click
72．What would be the best title for this text ?
A．Banking of Various Forms B．Improvement of Banking Industry
C．Development of Online Banking D．Functions of the “Brick-to-Click” Bank
A lot of grown-ups worry that spending too much time playing video games isn’t good for a kid’s health. Now some doctors have noticed that kids who bring their hand-held game players to the hospital seem less worried about being there. These patients also seem to experience less pain when they are concentrating on a superhero adventure or a car race. At the Johns Hopkins Children’s Center in Maryland, young patients are finding hospital visits easier to deal with, thanks to a test program called the Hospital-based On-line Pediatric Environment (HOPE). Patients in HOPE have a life-threatening condition where their kidneys(肾脏)no longer filter(过滤)wastes from their blood. To get their blood cleaned, these kids must be hooked up to dialysis(透析) machines at the hospital three times a week, for at least three hours each time. HOPE allows kids to play online sports, racing, and adventure game
s with each other. Eventually they will be able to connect with kids in other ho
spitals who are suffering from the same problem. "We want to use the power of the Internet to bring together kids who feel that they are separated by their illness, and let them know that they are not alone," said Arun Mathews, the doctor who heads the program. He loves video games himself and got the idea to connect kids all over the country. Many researchers elsewhere are testing video game programs that might help young patients. For example, nine-year-old Ben Duskin of San Francisco, who was struggling with cancer helped to design a video game where players get rid of cancer cells. That’s all great news, because doctors already know that reducing pain and worry helps patients heal faster.
64. What’s the main idea of the passage?
A. Playing video games too much is bad for kids’health.
B. Playing video games seems to be beneficial to young patients’ recovery.
C. Doctors find that reducing pain helps patients recover faster.
D. Doctors invent a game to help kids in hospitals.
65. How long will it take a patient to get his blood cleaned in a week?
A. About 3 hours. B. About 6 hours. C. About 9 hours. D. About 21 hours.
66. According to Arun Mathews, the main purpose of HOPE is to _________.
A. encourage kids to play online games
B. teach kids how to design video games
C. help kids who are suffering from illness connect with each other
D. make parents worry less about their kids playing video games too much
67. Which of the following plays the most important role in the HOPE project?
A. Music. B. The Internet. C. Novels. D. Films.
68. What can we learn from the passage?
A. Nine-year-old Ben Duskin, who has a cancer, is very brave and clever.
B. Many parents want their children to play video games because it’s good for their health.
C. Doctors are not sure whether reducing pain and worry can help the patients recover faster.
D. HOPE allows kids to play online g
ames only with the kids in the same hospital.
Ⅳ.阅读理解（第一节共20小题，每小题1.5分，满分30分；第二节共5小题，每小题1分，满分5分。两节满分共35分）
Just because you are in a wheelchair doesn’t mean you can’t enjoy the competitiveness(竞争) —the all-around fun —that playing sports offers you. More and more wheelchair users are playing sports every day —some even on a professional level. The following are just a few examples of the different choices you 
have.
Wheelchair basketball is a very common wheelchair sport. It was started over forty years ago as part of a medical recovery(康复) program. Over the years it has grown rapidly. Today wheelchair basketball is a professional sport that has more than 180 teams across the United States. In order to play wheelchair basketball, it is essential to have a lightweight wheelchair. Several different kinds of sports wheelchairs are on the market today just for sports fans.
Another wheelchair sport, quad rugby(橄榄球), was specifically designed for people who can’t move their arms or legs and are unable to play wheelchair basketball. It is a mixture of wheelchair basketball and ice hockey. To play the game you must have two teams of four players each.
Power soccer is another fun wheelchair sport that can be very fun and exciting. Players in power soccer must have an electric wheelchair. Two teams have two 30-minute halves to push the soccer ball over the other team’s goal line. The first team to reach the other team’s goal line most frequently wins.
Based on the sport you choose to take part in, there are several things you can buy for your wheelchair, including belts, gloves, bags for carrying things, drink holders and special back supports.
61. In which part of the newspaper will you read this passage?
A. Technology. B. Society. C. Culture. D. Health.
62 In the beginning, wheelchair basketball was started for the purpose of ______.
A. holding p
rofessional games around the US
B. spreading the sport all over the US
C. helping patients return to a normal life
D. making people want to play sports
63. What is the main idea of the passage?
A. To introduce some possible sports to wheelchair users.
B. To introduce some products to the wheelchair users.
C. To encourage wheelchair users to compete with each other.
D. To talk about the differences between these sports.
I arrived at my mother’s home for our Monday family dinner. The smells of food flew over from the kitchen. Mother was pulling out quilt(被子)after quilt from the boxes, proudly showing me their beauties. She was preparing for a quilt show at the Elmhurst Church. When we began to fold and put them back into the boxes, I noticed something at the bottom of one box. I pulled it out. “What is this?” I asked.
“Oh?” Mom said, “That’s Mama’s quilt.”
I spread the quilt. It looked as if a group of school children had pieced it together; irregular designs, childish pictures, a crooked line on the right.
“Grandmother made this?” I said, surprised. My grandmother was a master at making quilts. This certainly didn’t look like any of the quilts she had made.
“Yes, right before she died. I brought it home with me last year and made some changes,” she said. “I’m still working on it. See, this is what I’ve done so far.”
I looked at it more closely. She had made straight a crooked line. At the center of the quilt, she had stitched(缝) a piece of cloth with these words: “My mother made many quilts. She didn’t get all lines straight. But I think this is beautiful. I want to see it finished. Her last quilt.”
“Ooh, this is so nice, Mom,” I said.
It occurred to me that by completing my grandmother’s quilt, my mother was honoring her own mother. I realized, too, that I held in my hands a family treasure. It started with the loving hands of one woman, and continued with the loving hands of another.
68. Why did the author go to mother’s home?
A. To see her mother’s quilts. B. To help prepare for a show.
C. To get together for the family dinner. D. To discuss her grandmother’s life.
69. The author was surprised because __________________.
A. the quilt looked very strange. B. her grandmother liked the quilt.
C. the quilt was the best she had seen. D. her mother had made some changes
70. The underlined word “crooked” in the passage most probably means __________ .
A. unfinished B. broken C. bent D. unusual
71. Which of the following would be the best title for the passage?
A. Quilt Show B. Mother’s Home C. A Monday Dinner D. Grandmother’s Quilt
Opening week specials at Munchies Food Hall.
At the corner of Green and Brown Streets in the city
Monday 7th of January until Sunday.13rd of January 2008
|
Feast until you’re full! Come down to Monetizes time week to enjoy the special dishes on offer it all of our food outlets. Order from the following:
●Succulent chicken rice ●spicy stays beef