前言:想要寫出一篇令人眼前一亮的文章嗎?我們特意為您整理了5篇練習(xí)題范文,相信會為您的寫作帶來幫助,發(fā)現(xiàn)更多的寫作思路和靈感。
1. ―How about _____ fishing there?
―That’s a good idea.
A. goB. going
C. to go D. goes
2. I’m not sure about my future job _____ .
A. alsoB. too
C. yet D. already
3. My dream is _____ teacher.
A. be B. to be
C. to be aD. be a
4. The girl often _____ her bike to keep it_____ .
A. clean, clean
B. cleans, clean
C. cleaned, clean
D. clean, cleaned
5. An _____ must take _____ lessons.
A. actor, act
B. actor, acting
C. acting, actor
D. acting, act
6. There _____ an exam tomorrow.
A. is going to
B. is going to be
C. is going to have
D. is going
7. When my father was fourteen, he started_____ a football team.
A. to play withB. to play for
C. playing withD. playing as
8. Look! Here _____ so much good food.
A. is B. are
C. beD. am
9. I think English is _____ than Chinese.
A. much interesting
B. more hard
C. interesting
D. much more interesting
10. I’m thirsty, can you bring me _____ , please?
A. any water
B. some water
C. any waters
D. some waters
11. He often walks _____ home, but sometimes he takes a bus.
A. in B. /
C. forD. at
12. He could hum songs and different _____ .
A. piece of musics
B. pieces of music
C. piece of music
D. pieces of musics
13. ― _____ you start learning English?
―At the age of five.
A. When do B. When did
C. How long do D. How long did
14. He is too tired _____ .
A. walk B. to walk
C. walkingD. to walking
15. He spends his free time _____ TV.
A. to seeB. to watch
C. seeingD. watching
16. What can they do _____ famous stars?
A. becomingB. to become
C. became D. becomes
17. Will youplease _____ us?
A. take part in B. join
C. to join D. to take part in
18. We had great fun _____ on the beach.
A. to playB. playing
C. play D. played
19. ―Have a good school trip!
―_____.
A. You’re welcome
B. Don’t say it
C. The same to you
D. Thank you
20. _____ it rained all day, _____ we didn’t have a yard sale.
A. Because, soB. Because, /
C. /, / D. /, because
二、完形填空。
Tom 1 very early in the morning. He dresses himself, washes his face and goes out to run2 . Then he has his breakfast. Everyday he goes to school3 . 4four classes in the morning. After class he5some books.
6is at twelve. After lunch he 7 a short rest. In the afternoon he has two classes. Then he has half an hour 8 sports. He plays basketball 9 soccer. In the evening he does his 10at home. He goes to bed at ten.
1. A. get B. gets up
C. gets onD. gets
2. A. outside the air
B. out the gate
C. in the open air
D. on the land
3. A. on his bike
B. on bike
C. by his bike
D. rides his bike
4. A. There isB. There are
C. HaveD. Has
5. A. reads B. watches
C. sees D. looks
6. A. Breakfast B. Lunch
C. Meal D. Supper
7. A. hasB. have
C. take D. taking
8. A. inB. on
C. for D. to
9. A. and B. or
C. but D. so
10. A. worksB. homework
C. houseworkD. homeworks
三、閱讀理解。
A
Jack’s mother asked him to move the family piano from the dining room to the living room. He was strong, but not strong enough to move the piano any farther than the doorway between the rooms. So he called Peter for help.
“You take this end,” Jack told Peter when he got there. “and I’ll go around to the dining room and take the other end.”
Peter nodded, and when Jack was in place and gave the word, he pushed and pushed, but it still didn’t move. They had a rest.
“Boy,” Peter said, “I don’t know if we’re even going to get it into the dining room. I’ve pushed...”
“Push?” Jack repeated, “I thought you were pulling it to the living room.”
1. The family piano was _____ before Jack’s mother asked him to move it.
A. in the dining room
B. in the living room
C. in the bedroom
D. between the living room and the dining room
2. Jack only wanted to _____ .
A. make something move
B. lift something
C. throw something away
D. keep something in place
3. Jack was _____ .
A. strong enough to move the family piano
B. not strong enough to move the family piano to the living room
C. too strong to move the family piano to the living room
D. strong but he couldn’t move the family piano at all
4. It still didn’t move, because _____ .
A. the piano was too heavy
B. Jack didn’t work hard
C. neither of them worked hard
D. both of them pushed the piano
5. Who did wrong?
A. Peter. B. Jack.
C. Both of them.D. Neither of them.
B
These months I have been busy playing“QQ Farm”. Though it is a game, it is so successful that so many people are interested in it. Not only the young, but also the old. I often went to bed late or got up early to pick or steal the fruit and vegetables.I thought it was so interesting that I lost myself in it. Ieven asked my husband to help when I wasn’t online and we helped each other. I also wrote down the time when the fruit and vegetables could be picked so thatI was able to pick them exactly. Of course our gold coins were getting more and more and our ranks were becoming (1) , but sometimes my husband stayed up until 2 a.m. in order to pick the fruit and vegetables. It’s too terrible!(2) I thought I spent too much time on it.It’s only a game. If I regard it as an important part of my life, it’s too boring. From now on, I should spend more time in doing something else.
6. 這篇短文的題目最好定為: _____
7.將(1)處填上適當(dāng)?shù)脑~。詞數(shù)不限。 _____
8.將(2)處畫線部分改為否定句。_____
C
中國自古以來就有尊師重教的優(yōu)良傳統(tǒng),“程門立雪”就是一個典型的例子。請根據(jù)下面的圖畫、上下文及首字母提示寫出所缺單詞,補全段落。
Long, long ago in China there was a young man called Yang Shi. One day he and his friend went to visit their teacher Cheng Yi for a problem. It was s 9heavily. Cheng Yi was sleeping then, so Yang Shi and his friend waited in the snow o 10. They kept waiting in the heavy snow until their teacher woke up. Then they found that the ground was already c 11with thick snow!
We should learn from Yang Shi and his friend and respect our teachers.A good e 12
makes a country strong.
D
閱讀下面雙語文章,根據(jù)所給語境,按要求完成下列各題。
清朝光緒年間,四川梁平縣一個叫劉牛的人搬到達縣居住,以賣鹵牛肉為生,無奈生意慘淡。為招徠顧客,一天,他在食攤前掛了一張又大又薄的牛肉,后面放了一盞油燈,燈影透過牛肉依稀可見,十分誘人。人們?nèi)テ穱L牛肉,覺得味道香辣鮮脆,于是稱它為“燈影牛肉”。從此燈影牛肉遠近聞名,流傳至今。
During the reign of Emperor Guang Xu in Qing Dynasty, a man (1)called Liuniu moved his home from Liangping county in Sichuan to Daxian .(2)He lived on by selling salted and stewed beef in soy sauce.(3)Because the beef was not sold well, he had to find out new ways. One day, in order to attract customers, Liuniu put a piece of beef in front of his stall, which was big and thin. He also put a lamp behind the beef. The lamp’s shadow could be seen vaguely through the beef. How thin the beef was!People thought it was interesting and all came to taste the beef. The beef tasted spicy and savory, people liked it very much and gave the name “Lamp’s Shadow (DengYing )Beef”. It became so popular that its name was passed on till now.
13.(回答問題)When was the Lamp’sShadow Beefinvented?
___________________________________
14. 將(1)處換成一個可替代的近義詞。
___________________________________
15. 用how對(2)處的句子提問。
___________________________________
16. 將(3)處改為主動句。
___________________________________
E
Hello, everyone. Here is something important for everyone going to London next month. As you know, you are going to stay with a family for two weeks. Now, the most important thing is money. You should take about £530 with you. I think it will be enough for everyone. Then, when you arrive, your new family will meet you. You must remember to wear a red shirt, so the family will find you easily. They’ve been told you all wear red shirts. You’ll also need to take with you four photos of yourself and, of course, it’s very important that you take the school letter. While you’re there, if you have any problems, you can call Leech School Office. I’ll give you the office phone number now: it’s 580-4436 and the person to ask for is Mrs Belcher. She’s in the office from nine o’clock in the morning until five in the afternoon every day. OK. That’s everything. Have a good journey!
四、用所給詞的適當(dāng)形式填空。
1. My mother often_____(wash) clothes on Sundays.
2. She_____(visit) her grandma last week.
3. My brother_____(write) now.
4. We had fun_____(play) in the water.
5. He sometimes_____(not do) his homework.
6. My little sister_____(stop) crying half an hour ago.
7. Tom tries to eat junk food_____(two) a week.
8. Do you know the_____(different) between the two books?
9. His mother wants him_____(eat) some fruit.
10. How about_____(run) in the morning?
五、完成句子。
1. 他在周末幾乎不做運動。
He _____ exercises on weekends.
2. 如果你牙痛,你應(yīng)該去看牙醫(yī)。
If you _____, you should _____.
3. 在假期她將照顧她的妹妹。
She will _____ for vacation.
4. 杰克昨天坐地鐵去學(xué)校。
Jack _____ school yesterday.
5. 星期六你能去看電影嗎?
_____you _____on Saturday?
6. 薩姆比湯姆外向得多。
Sam is _____ than Tom.
7. 我需要兩片面包和一茶匙的調(diào)味料。
I need _____ bread and _____ relish.
8. 劉翔出生于1983年7月13日。
Liu Xiang _____ July 13, 1983.
9. 將來我打算搬到某個安靜而漂亮的地方去。
I _____ move _____ quiet and beautiful in the future.
10. 你能洗餐具和把垃圾扔出去嗎?
Could you _____and _____?
六、書面表達。
以“My next Saturday chores”為題寫篇短文,談?wù)勀阆聜€星期六將要做的家務(wù)瑣事,并介紹你喜歡做的家務(wù)活和不喜歡的家務(wù)活。詞數(shù)80左右。
參考答案
一、1-5 BCCBB6-10 BBADB
11-15 BBBBD 16-20 BBBDB
二、1-5 BCABA6-10 BACAB
三、1-5 AABDA 6. About“QQ Farm” 7. higher and higher 8. I didn’t think I spent too much time on it. 9. snowing10. outside 11. covered 12. education13. During the reign of Emperor Guang Xu in Qing Dynasty.14. named 15. How did he live on? 16. Because he didn’t sell the beef well, he had to find out new ways.17. London18. two weeks19. will find, easily 20. 580-4436 21. teacher/ officer
四、1. washes 2. visited 3. is writing 4. playing 5. doesn’t do 6. stopped 7. twice8. difference9. to eat10. running
五、1. hardly ever2. have a toothache, see a dentist3. babysit her sister 4. took the subway to5. Can(Could), go to the movies6. much more outgoing 7. two slices of, one teaspoon of 8. was born on9. am going to, somewhere 10. wash the dishes, take out the trash
六、One possible verson:
My next Saturday chores
I am a middle school student. Let me tell you something about my next Saturday. Next Saturday I am going to do a lot of chores for my parents as usual.
值了一夜的班,我搭上了晃蕩亂響的小中巴往家趕。
一個小站,上來兩個女人:一個是漂亮的姑娘,一個是滿頭白發(fā)的老婆婆。
車上只有我身邊的一個空座位,姑娘眼尖,一屁股就坐了下來。老婆婆則站在了車門口,顫顫巍巍地抓著扶手。
此時車上的喇叭響了起來:“乘客同志們,如有老人、孕婦、殘疾人,請您讓座?!?/p>
老人向車內(nèi)環(huán)視了一周,大家都非常自覺地向窗外望去,就是沒有人給老人讓座。最后老人的目光鎖住了我。
我是不是應(yīng)該讓座?我在心里問了自己一句,尊敬老人是我們的社會公德,我真應(yīng)該讓座。可是昨夜我值了一夜的班,真是有點累了。
我與老人對視了一眼,就低下了頭。
中巴車?yán)^續(xù)向前行駛,我習(xí)慣性地想摸支煙,一不小心碰到了漂亮姑娘的手臂上。"對不起。"我漲紅了臉,低下了頭。"沒關(guān)系。"漂亮小姐口唇微啟,露出珍珠似的牙齒,嫣然一笑,我如沐春風(fēng)。
車上的喇叭又響了起來:"各位乘客,如有老人請讓座。"
"當(dāng),當(dāng),當(dāng)……"只見老婆婆正用力敲著車門,老人似乎發(fā)怒了。
乘客們都望著車外,似乎今天窗外的風(fēng)景格外好看。依舊沒有人給老人讓座。我一抬頭,看到老人憤怒的目光正盯著我。我心里老大的不高興,盯著什么?車上又不是只有我一個人,再說平時遇到這種情況我都是讓座的,可今天的情況特殊嘛。
我又低下了頭,依舊一動沒動。我聽到老人猛踹地板的聲音,一聲聲踹到我心里,可是我還沒有動。
又一個小站,姑娘起身下了車,發(fā)絲輕輕地掃過我的面頰。我順手想摸支煙,"我的錢包!"我猛地站了起來,頭一下就碰到了車頂,我齜牙咧嘴地罵了起來。
車上頓時沸騰起來,人們議論紛紛:"這么漂亮原來是個小偷。"
"我早就看出來了。"
"你怎么不早說呀?"
"關(guān)我什么事呀?再說萬一她不是一個人呢?"
我抱著頭,呆坐著一動不動。
"年輕人,"老婆婆走了過來,"剛才我提醒你,你卻沒有注意我呀!"
"什么,提醒我?"我吃了一驚。
"是呀!一上車,我就注意到小偷往你兜里摸,于是我就緊緊盯著你,可你一抬頭,卻又低下了頭。"
"她剛要下手,就碰到了你,你還跟她說話,我以為你知道了。"老婆婆接著講。
"后來,她下手了,我就敲車門,沒有敢當(dāng)面告訴你,你不要怪我呀!"老人不停地說。
我滿腹羞愧,不為被偷的幾十塊錢,而是_____。
閱讀題:
1、文中第5段“最后老人的目光鎖住了我”一句中的“鎖住”應(yīng)該怎樣理解?“鎖住我”的原因是什么?(3分)
2、文中畫線句屬于_____描寫,其作用是:(3分)
3、老婆婆為了提醒"我"錢包被偷,給了"我"哪些暗示?請按先后順序?qū)懗鰜怼?3分)
4、文末畫線處省略了揭示文章主旨的句子,請在下面的橫線上補充出來。(2分)
參考答案:
1、"鎖住"在這里的意思是"目不轉(zhuǎn)睛地看",原因是暗示"我"小偷正在偷"我"的錢包
2、心理 推動情節(jié)發(fā)展,形成懸念,使結(jié)尾更具戲劇性,并為"我"滿腹羞愧設(shè)下伏筆
在處理練習(xí)題時,學(xué)生做的方法很多,為了不打消他們的積極性我讓學(xué)生一一上臺展示:
有的學(xué)生做出了:60+70=130米 ,50+90=140米,130 ﹤ 140,所以小兔走商場這條路近。
有的學(xué)生只觀察就找到了答案:60比50多10米,而70比90少20米,所以小兔走商場這條路近。
一個平時不愛表現(xiàn)自己的學(xué)生只用一個式子便說明了:50+70﹤50+90,所以小兔走商場這條路近。
學(xué)生們不由自主地為建波鼓起掌來,有的還朝他豎起大拇指!
就這一道練習(xí)題從此改變了他,課上回答問題積極了,活躍了;作業(yè)書寫也變得漂亮了,同學(xué)們再也不說他“啞巴木偶”了。如此大的改變讓我體會頗深:
關(guān)鍵詞:快樂教學(xué);雙向交流;知識營養(yǎng)
在教學(xué)實踐中,認真鉆研教材,研討教法,大力實施快樂教學(xué),一再減輕學(xué)生負擔(dān),讓學(xué)生在快樂中學(xué)習(xí),快樂中生活,快樂中成長,使快樂激活學(xué)生思維,使快樂伴隨學(xué)生進步,使快樂推進學(xué)生發(fā)展,做好以上工作,除了學(xué)好基礎(chǔ)知識,培養(yǎng)良好的學(xué)習(xí)習(xí)慣外,還要閱讀課外讀物,做必要的練習(xí)題是必不可少的環(huán)節(jié)。練習(xí)題是指學(xué)生理解教學(xué)內(nèi)容的基礎(chǔ)上,以口頭解答,書面解答,操作等形式完成一定練習(xí),作業(yè),是知識運用的一種方式。習(xí)題教學(xué)可以使學(xué)生鞏固概念,規(guī)律,靈活運用知識,培養(yǎng)思維品質(zhì)和遷移能力,是教師了解學(xué)生學(xué)習(xí)效果的好方法。
學(xué)生學(xué)了課本上的基礎(chǔ)知識,喜歡都通過做練習(xí)的方式加強鞏固,學(xué)生都喜歡做適當(dāng)?shù)木毩?xí)題,認為做題有用,把所學(xué)知識與生活實際相結(jié)合,使學(xué)習(xí)了的知識運用在實際需要中,解決生活中的問題。練習(xí)題輔導(dǎo)應(yīng)注意以下幾點:
一、輔導(dǎo)為平臺 師生雙向交流
作為老師,堅持學(xué)生自學(xué)、自練為主,教師指導(dǎo)為輔的原則,在教學(xué)過程中有機地把教與學(xué)統(tǒng)一起來,學(xué)是主體,教是為了學(xué),在輔導(dǎo)練習(xí)的過程中,充分調(diào)動學(xué)生學(xué)習(xí)的積極性,培養(yǎng)良好的自做、自練、自學(xué)習(xí)慣。傳統(tǒng)的教學(xué)是教師講,學(xué)生聽,學(xué)生處于被動的學(xué)習(xí)狀態(tài),新課程標(biāo)準(zhǔn)強調(diào),學(xué)生的學(xué)習(xí)以合作、探究為主,提倡多樣化的學(xué)習(xí)方式,快樂學(xué)習(xí),自主學(xué)習(xí)。教師指導(dǎo)下自己學(xué)習(xí),熱愛學(xué)習(xí),鉆研學(xué)習(xí),多給學(xué)生一些做題的時間,多讓學(xué)生從問中明白解題的思路,做練習(xí),看過程,對答案,改錯誤,直到弄懂為止,從而解決問題。
作為學(xué)生,學(xué)好課堂知識,鞏固所學(xué)的知識,打下扎實的基本功,由“校內(nèi)”走向“校外”,有理論指導(dǎo)實踐,有實踐檢驗理論,才能多方面發(fā)展。因此,無論是課堂知識,還是課外文化知識,需要師生雙向交流。把學(xué)生做題效果反饋給老師,老師再分析,再歸納,在反思,最有效的方式方法給學(xué)生講解,不耐其煩的講解,細致入微的講解,直到學(xué)生滿意為止,因為學(xué)習(xí)的知識需要以練來鞏固,需要師生交流來看學(xué)生“吃”了多少,消化了多少,領(lǐng)會了多少,解決了多少,應(yīng)用了多少,學(xué)習(xí)習(xí)慣和品質(zhì)形成了多少,這樣才能把知識轉(zhuǎn)化為自己的能力,去解決實際問題。老師作為指導(dǎo)者,公平對待每一位學(xué)生,認真輔導(dǎo)學(xué)生需要輔導(dǎo)的問題,把學(xué)生當(dāng)作自己的孩子,用欣賞的眼光對待學(xué)生,會發(fā)現(xiàn)問題的眼睛去挖掘?qū)W生潛力,善于捕捉學(xué)生的閃光點,認為每位學(xué)生都能成為才子,在交流中,不斷調(diào)整教學(xué)進度,深度和廣度,隨時提醒教學(xué)過程中存在的問題,時刻滲透情感教育。
二、輔導(dǎo)為基石 鞏固知識運用知識
一堂課的成功與否,主要看學(xué)生掌握了多少,鞏固了多少,運用了多少,作為學(xué)生,會分析問題,會發(fā)現(xiàn)問題,會解決問題,又要自己去實踐,鍛煉認識事物的能力,培養(yǎng)動手操作能力,需要以練來鞏固。例如:一個工廠加工產(chǎn)品,工人掌握了技術(shù),需多次實踐,多次練習(xí),才能生產(chǎn)出好的產(chǎn)品。還如老師給你講了“授人以漁”的方法,自己親練習(xí)、親實踐,再練習(xí)、再實踐,才能掌握本領(lǐng),所以,學(xué)習(xí)跟加工產(chǎn)品,釣魚是一樣的,也需要練習(xí),再練習(xí),才能加工更多的“產(chǎn)品”來,釣出更多的“魚”來,使掌握的知識牢而不忘。習(xí)題教學(xué),可以使把零散的知識條理化、系統(tǒng)化,并可以適當(dāng)?shù)耐卣购脱由欤箤W(xué)生開拓視野,學(xué)生對知識的理解更準(zhǔn)確,更全面?;A(chǔ)知識扎實,思維開闊的學(xué)生,解題方法上鼓勵創(chuàng)新,用最直觀的方法,最快的速度,一題多解的方式,更鼓勵超長的思維解答出來;中等的學(xué)生,要求掌握基本方法,有精力再思考,反復(fù)練習(xí),盡量在提高;基礎(chǔ)較差的學(xué)生要積極鼓勵,一步一個腳印,掌握基本方法,逐漸熟練。
三、輔導(dǎo)為橋梁 促進步促成長
1.動起來
指導(dǎo)學(xué)生一堂一練,一堂多練,學(xué)習(xí)需要以練來鞏固,不同的學(xué)生采取不同的指導(dǎo)方法,可以做一些必做題和選做題,基礎(chǔ)鞏固訓(xùn)練,能力提升訓(xùn)練,思維拓展訓(xùn)練,指導(dǎo)學(xué)生把抽象化具體,復(fù)雜化簡單,化難為易,可用實驗法,演示法,舉例法,嘗試法等,老師指導(dǎo)下,在學(xué)習(xí)中感到有興趣,有成就,有進步,慢慢領(lǐng)會解題方法,鼓勵學(xué)生大膽去做,做錯了也是進步,比不動腦筋的學(xué)生來說好多了,對這類學(xué)生是這樣表揚的“你是動腦筋做錯了,否則什么也做不了”,這樣學(xué)生感到老師不但沒有批評,反而表揚了自己,內(nèi)心中受到極大的鼓舞,使自己更加動腦筋,更加不讓老師失望,爭取把每一道題都做正確了。
不管是對錯,應(yīng)鼓勵學(xué)生先親自動手動腦去做,按照上課老師講的方法或者自己獨創(chuàng)的方法去嘗試解決,若解決不了,再找小伙伴討論解決,討論中各抒己見,讓每人都有發(fā)表自己看法的機會,若小組解決不了,老師集中與分類相結(jié)合輔導(dǎo),因材施教,盡量滿足學(xué)生個人需要,這樣有利于張揚個性,有利于合作意識的培養(yǎng),從合作中感到愉悅,從內(nèi)心感到合作給自己帶來的精神食糧,從而深深懂得合作力量大,集體大家庭給自己帶來的溫暖。
A.突然腹痛B.急性腹膜炎體征C.休克癥象D.氣腹征象
2、出現(xiàn)黑便提示每日出血量為
A.5ml以上 B.50~100ml C.250~300ml D.500~600ml
3、能保護人體防止感染乙型肝炎的是
A.抗-HBs B.抗-HBc C.DNA抗體 D.HbeAg
4、慢性腎功能衰竭最常見的病因是
A.高血壓 B.糖尿病 C.慢性腎小球腎炎 D. 慢性腎盂腎炎
5、對慢性支氣管炎患者胸部叩擊排痰,每次叩擊時間多長為宜
A.5~10min B.10~15min C.15~20min D.20~25min
6、肺心病導(dǎo)致心衰的原因,最主要的是
A.心肌缺血 B.血液粘稠度增加 C.肺動脈高壓超過右心負荷 D.水電解質(zhì)平蘅失調(diào)
7、下列血清指標(biāo),在急性乙型肝炎患者病程中最早出現(xiàn)的是
A.抗-HBc B.HbeAg C.HbsAg D.抗-HBs
8、糖尿病最嚴(yán)重的急性并發(fā)癥是
A.感染 B.心血管病變 C.腎血管病變 D.酮癥酸中毒昏迷
9、尿毒癥最早和最常出現(xiàn)的癥狀是
A.消化系統(tǒng)癥狀 B.心血管系統(tǒng)癥狀 C.血液系統(tǒng)癥狀 D.神經(jīng)肌肉系統(tǒng)癥狀
10、SLE患者心臟病變以哪項為最多見
A.心肌炎 B.顱內(nèi)膜炎 C.全心炎 D.心包炎
11、心理學(xué)家馬斯洛的層次需要論中,最常見的需要是
A.生理需要 B.安全需要 C.愛與歸屬的需要 D.自我實現(xiàn)的需要
12、測定甲狀腺吸131碘率前,須忌食含碘較高的食物
A.一個月 B.2周 C.2天以上 D.1周
13、在大多數(shù)傳染病中,傳染過程的五種表現(xiàn)那種出現(xiàn)率最高
A.病原體被消除 B.隱性感染 C.顯形感染 D.病原攜帶狀態(tài)和潛伏性感染
14、突然發(fā)作的吸氣性呼吸困難,臨床上最常見于
A.自發(fā)性氣胸 B.支氣管哮喘 C.阻塞性肺氣腫 D.氣管內(nèi)異物或梗阻