问题 单项选择题

属于细菌基本结构的是()

A.鞭毛

B.荚膜

C.菌毛

D.核体

E.芽孢

答案

参考答案:D

解析:细菌的结构与生理细菌:是原核生物界中的一大类单细胞微生物,按其个体形态可分球菌、杆菌和螺形菌三类。细菌的基本结构有细胞壁、细胞膜、细胞质和核体(染色体)等。某些细菌还具有一些特殊结构,如鞭毛、菌毛、荚膜和芽孢等。【考试科目】《兽医微生物学与免疫学》

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Dear Editor,

I’m now busy in preparing for the Postgraduate (研究生) Entrance Exam. A few days ago, I happened to see some new guidebooks for those who want to take next year’s exam. With too many hopes and without taking it into too much consideration, I bought several that were written by some known for helping candidates (应试者) for master’s degrees.

What made me really angry was the starting discovery that the contents of those books were almost exactly the same as some I had bought before. There were only superficial (外表的) changes in their covers, with more attractive new titles and better designs. The contents were the same.

People say that the publishing industry is in a state of chaos (混乱) these days but I used to be doubtful abut that. I was of the opinion that only people of noble character, prestige (威望), and exceptional talent would produce books for higher education. But these editors are caring little about their readers.

I hope that authors and publishing houses will be more responsible for their readers. Don’t destroy the image that you have with your readers.

小题1:The writer bought some guidebooks in order to ___________________________.

A.write an essay on guidebooks

B.prepare for the entrance exam

C.give his students a lecture

D.send them to his good friends小题2:The writer was angry because _________________________________________.

A.there were a lot of printing mistakes in the books that he had bought

B.the books were so expensive that he couldn’t afford any of them

C.he found the books he had bought were thin but of poor quality

D.the books had the same contents as what he had bought before小题3: In the writer’s opinion, publishers should be _____________________________.

A.responsible

B.kind-hearted

C.hard-working

D.creative