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(1)该特异性免疫属于 免疫,图中b细胞在人体内可以来自 细胞。
(2)图中a、b、c、d能够识别抗原的是 。(填字母)
(3)若图中所示的抗原为酿脓链球菌,因其表面的抗原决定簇与人心脏瓣膜上的一种物质的表面结构十分相似,物质d向心脏瓣膜发起进攻,使人患上风湿性心脏病,这属于免疫失调中的 病。
(4)当抗原经过⑤⑥过程时,人体内产生d的主要特点是数量多、速度快,与合成与分泌d有关的细胞器有 、 、
、 。
(5)研究发现,HIV病毒的增殖需要逆转录酶,从遗传物质分析,研究HIV疫苗比较困难的主要原因是 。 查看习题详情和答案>>
词汇(共25题,每题1分,计25分)
A. 根据句意和汉语提示写出单词,完成句子。
1. Whatever your _________(选择) is, I will just follow you.
2. Put on your coat, (否则)you will catch a cold..
3. The famous scientist is always busy doing (实验) in his lab at the weekends.
4. Thank you for your (有价值的) help and practical advice.
5.With the help of my English teacher, I have made great_________(进步) this term.
B. 根据句意,用所给单词的适当形式填空。
6. I hate to be like anyone else and try to do everything (different)
7. To tell you the __________(true), I don’t like to sit with him.
8.The boy is so ______( care) that he often makes many mistakes in his homework.
9. He is so ____ (honest) that few students in his class like to make friends with him.
10.My father made a final __________(decide) after thinking it over.
C.根据句意,用所给动词的适当形式填空。
11. He________(prefer) outdoor activities to films last year.
12. Most people have seen the film (direct) by the famous director.
13. We hope that more charity shows ________(hold) to raise money for Project Hope.
14. No country _________(make) such great progress as China in the past thirty years
15.The doctor told us he would do what he could ________( save ) the patient.
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B. 根据短文内容和所给中文提示,写出空白处单词的正确形式,每空限填一词。
Dear Tony,
My name is Bob. I am 【小题1】 (八) years old. I’m from China, and I live in the north of Canada because my parents 【小题2】 (都) work here. It is 【小题3】 (冬天) now and the temperature is一20℃. It often 【小题4】 (下雪) here. There is thick ice on the river. It is very cold but my friends and I often play 【小题5】 (足球). It is my favorite sport.
I have three 【小题6】 (宠物) dogs. They are lovely. They are all 【小题7】 (白色的). They like 【小题8】 (跑) after me. My favorite food is 【小题9】 (鱼) and chips.
There are five people in my family. We usually speak 【小题10】 (中文) at home,and we can all understand English. My English teacher helps me with this letter.
Please write to me about you and your home.
Best wishes,
Bob
【小题1】—Do you know whose book this is?
—Let me see. Oh, it’s Lisa’s. ________ name is on it.
【小题2】 I think the dictionary is very ________ to your study.
【小题3】He wasn’t feeling well, so he had to stop ________ .
【小题4】Yi Jianlian is one of the most famous basketball ________ in China.
【小题5】 My family usually have a get-together ________ a month.
B) 根据句意及所给的词首字母或汉语提示,补全单词。
【小题6】 —What’s your uncle’s j ?
—He’s a waiter in a restaurant.
【小题7】 We can’t breathe f________ air because of polluted environment.
【小题8】. Time is knowledge and time is money. Don’t w________ it, please.
【小题9】China is a great country with over 5,000 years of ________ (历史).
【小题10】 You must ________ (归还) the library book on time.
A.根据句子意思,写出下列句子括号内所给单词的正确形式。
【小题1】The children often get _______(noise) in the classroom after class .
【小题2】Sometimes he spends his weekend ________(fish).
【小题3】Several _______(foreign)came to visit our school last week.
【小题4】I think the red skirt looks as ______(good)as the green one .
【小题5】John just got his _____(driver) license.
【小题6】Look!Mrs Li is there. Let’s go and say hello to______(she)?
【小题7】.My mother often_____(enjoy) the TV plays in the evening.
【小题8】Talking loudly in a library is very______(polite).
B.根据句子意思及所给的首字母或汉语提示,写出该句子中所缺的单词。
【小题9】Li Na is a famous tennis p______.
【小题10】We can’t l______ to music when the teacher is talking in class.
【小题11】The children had a______ been asleep when I got home .
【小题12】Mr Li is s_____with his students and makes them work hard.
【小题13】Zhou Gu was _________(采访)by the local newspaper.
【小题14】There are ______(五十二)weeks in a year.
【小题15】The doctor gave him some medicine for his serious ______(疾病)。