[题目]塞卡病毒是一种单股正链RNA病毒.某人感染塞卡病毒后.出现了发热症状.并在一周后痊愈.请回答下列问题.(1)塞卡病毒是由组成.其增殖发生在 (填“细胞内或“细胞外 ).(2)塞卡病毒侵入机体后.发生免疫反应.B淋巴细胞接受病毒刺激后.在的作用下增殖分化成浆细胞.后者分泌只与塞卡病毒结合的抗体.体现了抗体具有的特� 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】塞卡病毒是一种单股正链RNA病毒。某人感染塞卡病毒后，出现了发热症状，并在一周后痊愈，请回答下列问题。

（1）塞卡病毒是由______________组成，其增殖发生在___________(填“细胞内”或“细胞外”)。

（2）塞卡病毒侵入机体后，发生免疫反应，B淋巴细胞接受病毒刺激后，在___________的作用下增殖分化成浆细胞，后者分泌只与塞卡病毒结合的抗体，体现了抗体具有___________的特点。

（3）塞卡病毒侵入机体后引起发热，是因为塞卡病毒侵入后刺激机体分泌_________增多，细胞代谢增强，同时骨骼肌也会战栗，使产热增多。

（4）通过上述可知，机体稳态的维持是________________调节的结果。

【答案】（1）蛋白质外壳和RNA 细胞内

（2）淋巴因子特异性

（3）甲状腺激素和肾上腺素

（4）神经—体液—免疫

【解析】（1）塞卡病毒作为一种病毒，没有完整的细胞结构，其本身是由蛋白质外壳和RNA组成，其增殖只能发生在活细胞内。

（2）塞卡病毒作为抗原，侵入机体后，发生免疫反应。当B淋巴细胞接受病毒刺激后，在T细胞分泌的淋巴因子的作用下增殖分化成记忆细胞和浆细胞，浆细胞分泌的抗体只与塞卡病毒结合，体现了抗体具有特异性的特点。

（3）促进机体产热的激素主要是甲状腺激素和肾上腺素，只有当机体受到刺激后分泌这两种激素增多，细胞代谢才增强，使机体产热增多。

（4）机体稳态的维持是神经—体液—免疫调节的结果。

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【题目】书面表达

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参考词汇：communicate(v.)交流 activity(n.)活动

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用方框中所给短语的适当形式空。

be based on far from on the run free from

not uncommon would rather. . . than

have a (an). . . place in before long

【1】 Joe and Delia met in a studio. they were good friends and got married.

【2】 They are both kind and honest. Their relationship mutual respect.

【3】 With three young children to take care of, Helen is kept every minute of the day.

【4】The old couple plans to move to a quiet village traffic noise and industrial pollution

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【题目】完形填空

阅读下面的短文，从短文后各题所给的A、B、C和D四个选项中，选出可以填入空白处的最佳选项。

Mandela, South African freedom fighter, was put in prison on a lonely island for 27 years. In those years he was 1 treated though already reaching his 2 age. The rocky island, which is covered with snakes, seals and other 3 , is 7 miles 4 from the capital. In the daytime, Mandela had to work on a stone pit, 5 big stones into small pieces or go to the sea, 6 kelp(海带) out of the cold seawater. Being a major criminal, he was specially 7 by three men, who were always finding faults in what he did and then 8 him.

1991 saw Mandela’s release(释放)from 9 . One of his touching moments happened on his ceremony of his coming into 10 . As elected President of South Africa, he first introduced the political 11 from all over the world. He said he was pleased to meet them at his introduction into Presidency. But, to his greatest __12__, the three guards also attended the ceremony. He 13 them to rise from their seats so as to be introduced to everybody 14 . Being old, he slowly stood up from his seat and 15 to the three very men. A tongue-tied silence occupied the hall. Being so 16 , Mandela made all the whites, who cruelly treated him for many years, 17 to death. His behavior won him universal admiration.

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【1】A. badly B. well C. equally D. seriously

【2】A. own B. old C. high D. certain

【3】A. plants B. stones C. insects D. animals

【4】A. far B. along C. away D. off

【5】A. picking B. digging C. putting D. breaking

【6】A. collecting B. producing C. discovering D. planting

【7】A. served B. guarded C. treated D. cured

【8】A. punished B. killed C. hated D. fired

【9】A. sentence B. election C. prison D. office

【10】A. palace B. room C. get-together D. power

【11】A. opinions B. leaders C. demands D. differences

【12】A. surprise B. anger C. joy D. disappointment

【13】A. let B. demanded C. ordered D. requested

【14】 A. around B. nearby C. present D. faraway

【15】 A. saluted B. greeted C. apologized D. talked

【16】A. experienced B. broad-minded C. generous D. open-minded

【17】A. pitiful B. painful C. delighted D. shamed

【18】A. at war B. at church C. in prison D. in school

【19】A. fight B. survive C. make D. spend

【20】A. freedom B. life C. work D. politics

【题目】书面表达

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【题目】七选五

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Snow is a subject of great interest to weather experts. 1 One reason is that heavy amounts of snow fall in surprisingly small areas. Another reason is that a small change in temperature can mean the difference between snow and rain.

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I was nine when I arrived at the Children’s Home in Nashua in 1965. I failed third grade that year, __1__ made it through a second time, and had 2 through fourth grade by the time I 3 Pauline Jambard’s fifth-grade class at Charlotte Avenue Elementary School.

I was 4 I wasn’t smart like the other kids, and I hoped I could make it through fifth grade. I felt Ms. Jambard took a(n) 5 interest in me. Of all the subjects in school, reading was my 6 . She would tell me, ＂Terry, keep reading. If you can understand what you’re reading, you’ll be more 7 than most kids.＂ After I read all the books in our program, I started reading the set of Encyclopaedia Britannica in our classroom. I couldn’t find 8 to read, and I started to really like school.

That December, the Children’s Home 9 a Christmas party for family and community members. My brother and I had no family to 10 . I still remember looking up and seeing Ms. Jambard walk through the front door of the Children’s Home. Realizing she was there to see me, I was 11 happy. That was the best Christmas of my life.

After I 12 from Ms. Jambard’s class in 1969, I moved and lost all 13 with my teacher. In 1983, I was on a business trip and had to drive through Nashua. I got a 14 to drop by Charlotte Avenue Elementary School. I was walking toward her classroom 15 she came out in the hallway and said ＂Terry!＂ It was as if I had 16 left. I was in seventh heaven on my flight home.

We have stayed in touch, and I 17 Ms. Jambard at least once a year. Because of the confidence she 18 in me, I went on to have a successful 19 in engineering and law enforcement. I don’t know if she realizes how much she helped me, but I’ll never forget her kindness and 20 in me.

【1】A. narrowly B. desperately C. shortly D. gradually

【2】A. broke B. looked C. struggled D. sailed

【3】A. considered B. skipped C. consulted D. reached

【4】A. convinced B. stressed C. motivated D. astonished

【5】A. distant B. instant C. constant D. consistent

【6】A. comfort B. honor C. limit D. favorite

【7】A. noble B. patient C. diligent D. clever

【8】A. anything B. enough C. something D. nothing

【9】A. caught B. received C. gave D. admitted

【10】A. invite B. attend C. adopt D. introduce

【11】A. extremely B. hardly C. hopelessly D. gradually

【12】A. escaped B. returned C. dismissed D. graduated

【13】A. track B. encouragement C. touch D. support

【14】A. decision B. chance C. leave D. challenge

【15】A. while B. until C. when D. after

【16】A. never B. already C. long D. still

【17】A. recall B. bother C. care D. visit

【18】A. missed B. expected C. observed D. planted

【19】A. dream B. career C .image D. hobby

【20】A. smile B. faith C. growth D. acceptance

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