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试题答案:
是指机体免疫系统识别“自己”和"非己”.(1分)对自身成分产生天然的免疫耐受,(1分)
对非己异物产生排除作用的一种生理反应。(1分)
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人工自动免疫与人工被动免疫有何区别?
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试述免疫球蛋白可变区(V区)与恒定区(C区)的主要功能。
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存在于不同种属之间的共同抗原称为( ) A. 异种抗原 B. 同种异体抗原 C. 异嗜性抗原 D. 天然抗原
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下列Ig中能通过与抗原结合而激活补体的有( ) A. IgG1 B. IgG2 C. IgG3 D. IgG4 E. IgM
非特异性调理素包括
不能直接识别结合细菌LPS,但与LPS活化信号的转导密切相关的模式识别受体是
与肿瘤相关的病原体是
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1.
在可行性分析的过程中,需要准备多个可选方案并进行评估和比较的阶段是( )
2.
已知中,AB=AC=3,,则BC长为A. 3 B. 4 C. 5 D. 6
3.
More more people today __________. 查看材料
4.
3. Questions 1 to 5 are based on the following passage.What exactly is a lie?Is it anything we say which we know is untrue?Or is it something more than that?For example,suppose a friend wants to borrow some money from you. You say “I wish I could help you but I'm short of money myself.” In fact,you are not short of money but your friend is in the habit of not paying his debt and you don't want to hurt his feelings by reminding him of this. Is this rally a lie?Professor Jerald Jellison of the University of Southern California has made a scientific study of lying. According to him,women are better liars than men,particularly when telling a “white lie”,such as when a woman at a party tells another woman that she likes her dress when she really thinks it looks awful. However,this is only one side of the story. Other researchers say that men are more likely to tell more serious lies,such as making a promise which they have no intension of fulfilling. This is the kind of lie politicians and businessmen are supposed to be particularly skilled at:the lie from which the liar hopes to profit or gain in some way.Research has also been done into the way people's behavior changes in a number of small,apparently unimportant ways when they lie. It has been found that if they are sitting down at the time,they tend to move about in their chairs more than usual. To the trained observer they are saying “I wish I were somewhere else now.” They also tend to touch certain parts of the face more often,in particular the nose. One explanation of this may be that lying causes a slight increase in blood pressure. The tip of the nose is very sensitive to such changes and the increased pressures make it itch.Another gesture which gives liars away is what the writer Desmond Morris in his book Manwatching calls “the mouth cover”。He says there are several typical forms of this,such as covering part of the mouth with the fingers,touching the upper-lip or putting a finger of the hand at one side of the mouth. Such a gesture can be understood as an unconscious attempt on the part of the liar to stop himself or herself from lying.Of course,such gestures as rubbing the nose or covering the mouth,or moving about in a chair cannot be taken as proof that the speaker is lying. They simply tend to occur more frequently in this situation. It is not one gesture alone that gives the liar away but a whole number of things, and in particular the context in which the lie is told.(10分)3.1 According to the passage,a “white lie” seems to be a lie(2分)A. that other people believeB. that other people don't believeC. told in order to avoid offending someoneD. told in order to take advantage of someone
5.
下列合同属于无效合同的是()
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