题目列表(包括答案和解析)
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Hello, dear family! I am having a fun week here at The Mall. I had lunch with Pan and Jack on Monday. On Tuesday, I designed a new dress. Yesterday, Tom told me a funny joke. He always makes me laugh! | Hi, everyone! I made a chocolate cake yesterday. That’s Amy's favorite. I wish I could mail you a piece, Amy! It's really delicious. Today was warm and sunny. Your father and I went for a walk in the park. We also waited your Aunt Betty. She told us some good news. Your cousin John got a new Job! Oh, I'm writing too much, aren't I? We really miss you all. Take care! | |
Hi, all! Last week I was feeling sad. I had a bad day at work. My boss was angry at me. But the next day was better. I did a good job and my boss was very happy, so I felt better. Sometimes my work is hard. But I am really thankful for my job. | ||
Dear ones, let me tell you a story. A long, long time ago, A man lived a house on a hill. He had a candle. He lit the candle every night. Everyone could see the light. Then one night, something wonderful happened… | ||
Hello! I miss you all. However, I don't have much time to write this week. I'll write more next time. Bye, everyone! |
A.On the same family diary. | B.On their own diaries. |
C.On Amy's diary. | D.On Mother's diary. |
A.On Monday. | B.On Tuesday. | C.Yesterday. | D.Today. |
A.The job makes him sad. | B.The job always gives him pleasure |
C.The job is too easy. | D.The job is a challenge. |
A.She made a chocolate cake. | B.She did nothing but walk in the park. |
C.She got a new job. | D.She went for a walk and visited Aunt Betty. |
A.Amy and her family. | B.Amy and her diary. |
C.A family's diary. | D.Amy's father writes stories. |
—When did you get last night? —At 11:00.
A.home |
B.to home |
C.at home |
D.in home |
On June 26, 2000, two scientists, called Francis Collins and Craig Venter, told the world that they could read the whole “map” of the human body: DNA. DNA is something that everybody has, and it tells the body what to do. DNA is the reason that we look like our mother and father, because we get some of their DNA to make our own.
People have been trying to understand the human body for a long time. In 1860, Gregor Mendel discovered a special reason why we look the same as other people in our family. It is because of small things named “genes” in our body. In 1953, James Watson and Francis Crick made another discovery and found out that those small parts are real messages written in the DNA with a special language.
In 1961, Marshall Nirenberg and Johann Matthaci found a message in DNA showing how DNA tells the cell(细胞)to build its parts. Scientists have now found all the words in the DNA map, but we still do not understand what they all do. By understanding what just one “word” means, we can help save more people from several illnesses.
Most people hope that this will help make better medicine and help sick people. Other people worry that when people begin to know more words and find out lots of other information, we might use it in a wrong way, just to make people more attractive, or stop sick people from getting jobs. Man would have to meet a lot of trouble if DNA technic wasn’t limited(限制)in use.
1.When did we first know why we look like other people m our family?
A.In 1860 B.In 1953 C.In 1961 D.In 2000
2.What does the underlined word “ genes” mean?
A. The “map” of DNA. B. A special language.
C. Small parts of DNA. D. DNA
3.What did the two scientists first discover in 1961 ?
A. The “map” of DNA. B. A new illness.
C. The language of DNA. D. A message of DNA.
4.What can we do if we understand some “ words” of the language inside the body
A.Make people get new jobs.
B.Make medicine for illnesses.
C.Make maps of human.
D.Make people less attractive.
5.What do people think about this work’?
A.It can cause good or bad results.
B.It can cause only good results.
C.It can cause good results but won’t work.
D.It can cause only bad results.
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