题目内容
Cut out part of a healthy person’s liver and transplant it into a sick person--it sounds like a complicated and dangerous operation , not to mention very expensive. But it is sometimes the only possible cure for a seriously ill patient with liver disease.
Until now British scientists have just announced a new stem cell technique, which allows them to grow healthy liver cells outside human bodies. According to the researchers, it could be another five to 10 years before the technique can actually be used to help patients with liver disease. However, they say the method might one day replace liver transplants altogether. The study was led by the University of Cambridge and the Welcome Trust Sanger Institute, a British genomics and genetics research institute. It was published in the journal nature on October 12,2011.
The researchers took skin cells from a patient with a mutation (变异) in a gene called alphal-antitrypsin (a-l抗胰蛋白酶). This gene makes a protein that protects our bodies against inflammation (炎症). People with changed or damaged alphal-antitrypsin are not able to release the protein correctly from the liver, so the protein is trapped there and eventually leads to liver cirrhosis (肝硬化).
Scientists then used an advanced technique to cut away the faulty section of DNA from a stem cell and replace it with a corrected one, according to the journal. The stem cells went on to produce fresh and healthy liver cells with normal protein levels. Scientists put the new liver cells into mice and found that they worked very well.
Stem cells are the life source of all other cells in the body. They could transform medicine, providing treatment for blindness, spinal cord injuries and other serous injuries. They could also be used to produce new cells for damaged organs.
David Lomas, a Cambridge biology professor who worked on the team, said: “If we can use a patient’s own skins cells to produce liver cells that we can put back into the patient, we may prevent the future need for transplantation. ”
71. what is the best title of this passage?
A. How to transplant liver for patients B. A new way to transplant livers for patients
C. The difficulty in curing liver patients D. New life for liver patients
72. The first paragraph is written to _______.
A. show how difficult it is to cure liver disease
B. tell us what a liver transplant involves
C. introduce a potential cure for liver disease
D. show how serious liver disease can be
73.Why do some people get liver cirrhosis according to the article?
A. Because their bodies are lacking in alphal-antitrypsin.
B. Because their skin cells are not able to protect against inflammation.
C. Because the alphal-antitrypsin in their bodies is changed or damaged.
D. Because their liver releases too high a level of protein.
74. According to British scientists, liver transplant might ___________.
A. become history sooner or later
B. be replaced by a new stem cell technique in five years
C. be the only possible cure liver disease in the future
D. be prevented in the future
75. What can be inferred from the passage?
A. Stem cells can keep liver cells healthy and fresh.
B. Equaling medicine, stem cells can cure blindness, spinal cord injuries and other serous injuries
C. Stem cells can replace the damaged organs.
D. All other cells in the body can’t work well without stem cells
DCCAD
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When the lazy days of summer arrive and the schedule is packed with swimming，camp，and family vacations，it can be a challenge to find time for learning. But kids’ reading skills don’t have to grow cold once school’s out. Here are some ways to make reading a natural part of their summer fun.
Explore your library. Visit your local library to check out books and magazines that your kids haven’t seen before. Many libraries have summer reading programs，book clubs，and reading contests for even the youngest borrowers. With a new library card，a child will feel extra grownup checking out books.
Read on the road. Going on a long car trip？Make sure the back seat is stocked with favorite reads. When you’re not at the wheel，read the books aloud. Get some audiobooks (many libraries have large selections)and listen to them together during driving time.
Make your own books. Pick one of your family’s favorite parts of summer—whether it’s baseball，ice cream，or the pool—and have your child draw pictures of it or cut out pictures from magazines. Stick the pictures onto paper to make a booklet and write text for it. When you’re done，read the book together. Reread it whenever you like!
Keep in touch. Kids don’t have to go away to write about summer vacation. Even if your family stays home，they can send postcards to tell friends and relatives about their adventures. Ask a relative to be your child’s pen pal and encourage them to write each week.
Keep up the reading habits. Even if everything else changes during the summer，keep up the reading routines around your house. Read with your kids every day—whether it’s just before bedtime or under a shady tree on a lazy afternoon. And don’t forget to take a book to the beach！Just brush the sand off the pages—it’s no sweat!
【小题1】The purpose of the passage is to________.
| A．encourage parents to read |
| B．give advice on raising kids |
| C．raise a good summer reader |
| D．suggest places for vacations |
| A．visit the local library and join book clubs |
| B．borrow some audiobooks to listen to |
| C．keep in touch with friends by sending postcards |
| D．read your own picture books with your son |
| A．taking away the sand on the book is very difficult |
| B．a special book is needed when you’re reading on the beach |
| C．one can remove the sand on the book with a brush easily |
| D．there’s no trouble reading even on the beach |
| A．Parents. | B．Students. |
| C．Teachers. | D．Editors. |