正确答案: D

效应T细胞

题目：结核杆菌感染人体并侵入细胞后会引起结核病，体内接触该靶细胞并导致其裂解的免疫细胞是

解析：本题主要考查细胞免疫的基础知识。人教版必修三课本37页最后一段叙述如下：T细胞接受抗原刺激后，就会分化形成效应T细胞，效应T细胞就会与被抗原入侵的宿主细胞密切接触，并使靶细胞裂解死亡。

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举一反三的答案和解析：

[单选题]Which order of steps is followed in carrying out the project?

Design－Prototype－Assessment－Construction.

[单选题]科学的研究方法是取得成功的关键。下列关于人类探索遗传奥秘历程中的科学实验方法及技术的叙述，不正确的是 （ ）

格里菲思利用肺炎双球菌研究遗传物质时，运用了放射性同位素标记法

[单选题]细胞分类学所研究的分类学性状主要来自染色体。( )

正确

[单选题]

B． love C． humorous D． adventure

adventure

[单选题]下列对文中语句的理解，不符合文意的一项是

其馈遗清者相属于户

[单选题]In ancient times, people rarely travelled _______long distances and most farmers only travelled the local market.

as far as

解析：根据动词travel可判断此处应填关于路程的介词词组，本题即为as far as。as far as远到...

[单选题]D

It is true that good writers rewrite and rewrite and then rewrite some more. But in order to work up the desire to rewrite, it is important to learn to like what you write at the early stage. I am surprised at the number of famous writers I know who say that they so dislike reading their own writing later that they even hate to look over the publishers’ opinions. One reason we may dislike reading our own work is that we’re often disappointed that the rich ideas in our minds seem very thin and plain when first written down. Jerry Fodor and Steven Pinker suggest that this fact may be a result of how our minds work. . Different from popular belief ,we do not usually think in the works and sentences of ordinary language but in symbols for ideas （known as “mentalese”）, and writing our ideas down is an act of translation from that symbolic language . But while mentalese contains our thoughts in the form. of a complex tapestry （织锦），writing can only be composed one thread at a time . Therefore it should not be surprising that our first attempt at expressing ideas should look so simple. It is only by repeatedly rewriting that we produces new threads and connect them to get closer to the ideas formed in our minds. When people write as if some strict critics （批评家） are looking over their shoulder , they are so worried about what this critic might say that they get stuck before they even start. Peter Elbow makes an excellent suggestion to deal with this problem. When writing we should have two different minds. At the first stage, we should see every idea, as well as the words we use to express it ,as wonderful and worth putting down . It is only during rewrites that we should examine what we excitedly wrote in the first stage and check for weaknesses. 68. What do we learn from the text about those famous writers?

Many of them hate reading their own works

[单选题]玉米的雌雄花序都是以小穗为基本单位。( )

正确