阅读理解。 When you cut your skin, you bleed (流血). If a person los a lot of bl

题文

阅读理解。     When you cut your skin, you bleed (流血). If a person los a lot of blood (血), he will become ill and  may die. Blood is very important. People have known that. At one time, some people even drank blood  to make them strong!     When doctors understand how blood goes around inside the body, they try ways of giving blood to  people who need it. They take blood from the healthy people and give it to people who need it. This is  called "blood transfusion". The blood goes from the arm of the sick person.     But there are two problems. First, it does not always work. Sometimes people die when they have  blood transfusion. Later, doctors find that we do not all have the same kind of blood. There are four  groups - O, A, B and AB. We all have blood of one of the groups. They also find that they can give any  kind of blood to people of group AB. But they find that they must give A group blood to A group people  and B group blood to B group people. I have O group blood and the doctor told me that I could give  blood to anyone el safely.     There is another problem. To give blood of the right kind, doctors have to find a person of the right  blood group. Often they can not find a person in time. If they have a way to keep the blood until someone  needs it, they can always have the right kind of blood. At first they find they can keep it in bottles for  fifteen to twenty days. They do this by making it very cold. Then they find how to keep it longer. In the  end they find a way of keeping blood for a very long time.     We call a place where we keep money a "bank". We call a place where we keep blood a "blood  bank". One day, when you grow up, you may decide to give blood to a "blood bank". In this way you  may stop someone from dying. Or perhaps one day you become ill. You may need blood. The "blood  bank" will give it to you.1. From the passage, we learn that sometimes people die when they have blood transfusions becau they _____.    A. are unhealthy people                           B. have lost a lot of blood    C. are not given the right kind of blood               D. are AB group people2. Which of the following is true?    A. Doctors can give any kind of blood to the writer.      B. The writer can give blood to B group people.    C. The writer has never had a blood transfusion.        D. The writer has the same kind of blood as his father.3. People t up the "blood bank" so that they can _____.    A. give the right kind of blood to the people who need it in time.    B. keep different groups of blood as much as possible.          C. make it easier to ll or buy blood     D. keep blood for more than twenty hundred years4. From the last paragraph (段落) of the passage, we learn that _____.    A. the writer thinks it's good to give blood to a "blood bank"    B. we may become ill if we give blood to a "blood bank"    C. many people died becau they lost a lot of blood        D. blood is more important than money5. The writer doesn't talk about _____ in the passage.    A. how important blood is to us         B. the four groups of blood    C. where the blood bank is        D. what " blood transfusion" is

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1—5: CBCAC  

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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。