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阅读理解。 Have you ever dreamed about a trip to space? Seeds (种子)of some vegetables and crops are a lot luckier than you, as they have travelled to space and-九年级英语

[db:作者]  2019-11-12 00:00:00  零零社区

题文

阅读理解。
   Have you ever dreamed about a trip to space? Seeds (种子)of some vegetables and crops are a lot
luckier than you, as they have travelled to space and back.
    China is among the three countries in the world that carry out agricultural (农业的)research in space.
The others are Russia and the U.S. Since 1987, China has sent about 1000 kinds of seeds into space.
These include green peppers, tomatoes, cucumbers, carrots and rice. Even on China's first manned spacecraft Shenzhou V there were some seeds from Taiwan.
    "Conditions(条件) in outer space such as radiation(辐射)and low gravity can cause big changes in the
seeds," said Chinese researcher Jin Xing.
    But not all seeds are better after going to space. After returning to the earth, the best seeds are chosen. These seeds produce much more and also grow faster than normal seeds. As the safety of genetically
modified(转基因)food is still being talked about, some people are not sure about the safety of these
"space vegetables" because some of their genes(基因)are changed during the trip to space.
   But Jin holds the more hopeful view. He said, "Unlike genetically modified crops, no new genes are
introduced to the space vegetables, so they are surely safe."
    Space vegetables are better than normal vegetables. For example, space tomatoes stay fresh for twenty
days, which is one week longer than normal tomatoes. Another popular space vegetable is the peppers.
Space peppers have 20 per cent more vitamin C than normal peppers.
    Researchers are considering holding a tomato festival. By the time people will be able to enjoy about 30 different kinds of space tomatoes on their dining tables.
So far, the Chinese Academy of Sciences has set up three space vegetable base fields, one of which is in
Shenzhen while the others are in Beijing and Jiangsu Province.
1. What will happen when seeds of some vegetables are sent to space and carried back?
A. Some of their genes are changed.      
B. They are all better than before going to space
C. No changes are caused in the seeds.    
D. They all produce much more and grow faster.
2. Why does Jin Xing have no doubt about the safety of the space vegetables?
A. Because the seeds sent to space stay the same.
B. Because the seeds sent to space are the best.
C. Because no new genes are brought into them.
D. Because space vegetables are luckier.
3. Which of the following statements is TRUE?
A. Genetically modified food is completely safe. 
B. The space vegetables don't belong to genetically modified food in some ways. 
C. About 1000 kinds of seeds were sent into space on Shenzhou V.  
D. Seeds back from space must be planted in special rooms controlled by computers.
4. What is the underlined word "cucumber" in the second paragraph?
A. A product from Russia.            
B. A kind of gene. . 
C. A product from Taiwan.          
D. A kind of agricultural product.
题型:阅读理解  难度:中档

答案

1-4 ACBD

据专家权威分析,试题“阅读理解。 Have you ever dreamed about a trip to space? See..”主要考查你对  科教类阅读  等考点的理解。关于这些考点的“档案”如下:

科教类阅读

考点名称:科教类阅读

  • 科普类的阅读:
    科普类的阅读理解包含介绍科学知识、社会知识的短文。阅读这类短文时,要以事实为中心进行思考,抓住事物的特征、用途、相互关系等。
    如果是介绍社会现象的文章,要掌握所谈现象的内涵。

  • 答题技巧:
    1. 加强整体意识,把握文章的主要内容。在阅读的时候可给段落标上序号,并给重要的句子和
       关键词做上记号,尤其是各段中心句,为答题提供更快捷更多的信息源。
    2. 审清题干,发觉和把握试题中有效的提示性信息,确认命题的角度、阅读范围和答题方式。
    3. 定位阅读,强化对应意识。同时要注意原文利用和自我加工相结合。



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