上海高考 之选词填空(2)

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Passage twoWhat Are Antibodies? - Definition, FunctionA. markB. triggeredC. destroyedD. springsE. remainsF. instantlyG. intentlyH. signalsI. attackJ. advantageK. match Antibodies play a key role in the immune system. They begin the process of getting rid of the invaders that may cause harm or infection. This lesson covers how antibodies work and the different kinds of antibodies.What Are Antibodies?Antibodies, also known as immunoglobulins, are Y-shaped proteins that are produced by the immune system to help stop intruders from harming the body. When an intruder enters the body, the immune system (31) ______ into action. These invaders, which are called antigens(抗原), can be viruses, bacteria, or other chemicals. When an antigen is found in the body, the immune system will create antibodies to (32) ______ the antigen for the body to destroy.FunctionThe antibodies act sort of like the immune system's scouts. They find antigens, stick to them, and identify for the immune system the exact type of antigen so that it can be (33) ______. Each antibody is made for one and only one antigen, and it's fitted withspecial receptors that will only bind to that antigen. For instance, a specific antibody is created to help destroy the chickenpox virus. Only that particular antibody will attack a chickenpox virus.How Antibodies Fight AntigensSo what happens when an antigen tries to enter the body? When it does, the immune system is (34) ______. Chemical (35) ______ are sent to alert all the different parts of the immune system into action.First, the virus is met by a type of cell called B cells. The B cells are responsible for creating antibodies to (36) ______ the antigen. Remember, each type of antibody matches to only one antigen. After the B cells have created their antibodies, the antibodies stick to the virus, marking it for the next round of (37) ______. T cells are then ordered to attack the antigen that the antibodies have marked for it.After the antigen has been destroyed, the cleanup crew comes along. A wave of phagocytes, large cells that can consume foreign matter, eats the (38) ______ of the infection.ImmunizationsAfter an infection is defeated, the antibodies still remain in the body. They are left there to wait in case that particular antigen returns. Immunizations take (39) ______ of the fact that antibodies remain in the body after an infection is eradicated. Most immunizations consist of a weak or diluted form of an antigen - not enough of the antigen to make the patient sick, but just enough to trigger the creation of antibodies. This way, the body can (40) ______ attack any form of the infection it encounters, stopping the infections before they begin.【参考答案】DACBH KIEEJF【原文翻译】What Are Antibodies? Definition, Function什么是抗体?定义、功能Antibodies play a key role in the immune system. They begin the process of getting rid of the invaders that may cause harm or infection. This lesson covers how antibodies work and the different kinds of antibodies.抗体在免疫系统中起着关键作用。

他们开始清除可能造成伤害或感染的入侵者。

本课介绍抗体的工作原理和不同种类的抗体。

What Are Antibodies?什么是抗体?Antibodies, also known as immunoglobulins, are Y-shaped proteins that are produced by the immune system to help stop intruders from harming the body. When an intruder enters the body, the immune system springs into action. These invaders, which are called antigens, can be viruses, bacteria, or other chemicals. When an antigen is found in the body, the immune system will create antibodies to mark the antigen for the body to destroy.抗体,也被称为免疫球蛋白,是免疫系统产生的Y形蛋白质,有助于阻止入侵者伤害身体。

当入侵者进入人体时,免疫系统就会启动。

这些被称为抗原的入侵者可以是病毒、细菌或其他化学物质。

当在体内发现一种抗原时,免疫系统会产生抗体来标记该抗原,供机体破坏。

Function功能The antibodies act sort of like the immune system's scouts. They find antigens, stick to them, and identify for the immune system the exact type of antigen so that it can be destroyed. Each antibody is made for one and only one antigen, and it's fitted with special receptors that will only bind to that antigen. For instance, a specific antibody is created to help destroy the chickenpox virus. Only that particular antibody will attack a chickenpox virus.抗体的作用有点像免疫系统的侦察兵。

他们发现抗原,依附于它们,并为免疫系统识别抗原的确切类型,这样它就可以被破坏。

每一种抗体只针对一种抗原,并且它装有只与该抗原结合的特殊受体。

例如,一种特殊的抗体可以帮助消灭水痘病毒。

只有这种抗体才能攻击水痘病毒。

How Antibodies Fight Antigens抗体如何对抗抗原So what happens when an antigen tries to enter the body? When it does, the immune system is triggered. Chemical signals are sent to alert all the different parts of the immune system into action.那么当抗原试图进入人体时会发生什么呢?一旦发生,免疫系统就会被触发。