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题型:阅读选择 题类:常考题 难易度:普通

2016年浙江省温州市中考英语试卷

阅读下面短文, 从每小题所给的A、B、C、D四个选项中选出最佳选项。

    Harmful microbes like bacterias, viruses and other germs are pathogens. They may enter your bodies and make you ill. The immune system is the body's defence system that protects you from illness and disease caused by the pathogens.

    The immune system is made up of non﹣specialized defences such as skin, tears and the acidic juice produced by the stomach, keeping you from the pathogens. It also has some highly specialized defences, which are different kinds of immune cells, grouped into phagocytes and lymphocytes. Phagocytes are a type of white blood cell. They are swimming around in your blood stream, always on the lookout for antigens﹣the pathogens that have entered your bodies. Whenever they see one, their will eat it. However, some antigens are hard to find and kill. Then lymphocytes, which are also white blood cells and the main types are B cells, T helper cells and T killer cells, Will be the killers of the sneaky antigens.

    B cells, T helper and T killer cells work together to find and kill these antigens. B cells produce substances, called antibodies, which stick to the antigen. When that happens, it will tell the T helper cells to come over and either: 1. help the B cells kill the antigen, or 2. call the phagocytes or T killer cells to move in for the kill. Once a B cell or a T cell attacks an antigen, they create cells to "remember" it. Those "memory cells" hang out in your blood if they see the same antigen again, they quickly recognize, it so your immune system can act faster at killing it.

    The immune system is more powerful than you probably imagine. Scientists from the University of Pennsylvania recently took immune cells from three patients with leukemia, then genetically changed them into "serial Keller "cells to attack cancer cells. The study was small but the results were groundbreaking. The modified immune cells increased at least 1, 000 times in the body and killed all the cancer cells. Therefore, more "memory cells" were created.

    The immune system can be developed. Eating lean protein food (beef, beans )and food rich in vitamins A, C, and E(sweet potatoes, carrots ), taking a 30﹣minute walk every day and reducing your stress levels, etc. will help you achieve it.

(1)、What can the immune system do?

A、Keep you from antibodies. B、Protect you against antigens. C、Make your bodies weak and sick. D、Help microbes enter your bodies
(2)、How are the sneaky antigens found and killed?

A、Phagocytes, B, T helper and T killer cells work together B、Skin, tears, acidic juice and immune cells work together C、B cells create "memory cells" to swim around in the blood D、B cells produce antibodies to tell T helper and T killer cells
(3)、What does the underlined word "it" in the last paragraph refer to?

A、The immune system can be made more powerful B、Less antigens can be killed by the immune system C、White blood cells act less quickly in the immune system D、The immune system can be changed into the "serial killer"
(4)、This article is mainly about            .

A、the types of white blood cells B、a research report about human health C、the cause of illness and disease D、an introduction to the immune system.
举一反三
根据短文内容,判断下列句子是否正确.
   Plants are very important living things. Life could not go if there were no plants. This is because plants can produce food from the air, water and sunlight. Animals and man cannot produce food from the air, water and sunlight as plants do. Animals get their food by eating plants or other animals which eat plants. So animals and man need plants in order to live.
   If you look carefully at the plants around you, you will find that there are two kinds of plants: flowering plants and non-flowering ones.
Flowering plants can make seeds. The seeds are protected by the fruits. Some fruits have one seed. Some have two, three or four. Some have many. But a few fruits have no seeds at all. An example of a fruit without seeds is the banana.
   Most non-flowering plants don't grow from seeds. They grow from spores (孢子). Spores are very, very small. Some spores are so small and light that they can float in the air. We may say that spores are quite the same as the seeds. When these spores fall on wet and shady places, they usually grow into new   plants.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        

    The human brain weighs about 1.4 kilograms, but it can, hold much more information than most computers. However, there is another difference between humans and computers. Computers don't forget information they are given, but humans often do. No one remembers everything, and luckily we don't usually have to. But everyone can improve their memory if they want to. Here are some suggestions.
◆Try to use new information immediately*. For example, if you meet someone who says "Hi! I'm Carlos," don't just say "Hello." Repeat the person's name. Say "________"
◆Break a big number into smaller parts. For example, it's hard to memorize 109244153. But if you break it into three parts--109/244/153—it becomes easier.
◆Write out what you need to remember over and over again. This will help you keep it in mind longer, especially for memorizing formulas * or facts.
◆Always review information. If you bring what you've learned back to your mind, they become easier to remember. For example, before you go to sleep, it's a good idea to review the new things you learned that clay.
◆Discuss with a friend. It is always easier to remember things through discussions. You can have a discussion about what's right and what's wrong, and it will lead to the right answer.
◆Never tell yourself that you have a bad memory. You can always do something to help improve your memory. And everyone's memory gets better if they use it often enough.
    All of the suggestions are helpful. If you follow them, you are certain to improve your memory.

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