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慢性阻塞性肺气肿所致呼吸衰竭产生严重低氧血症的最重要的机制是:( )
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有关呼吸衰竭的概念哪一项不正确 ____ A.呼吸衰竭是由于外呼吸功能严重障碍导致PaO2低于正常或伴有PaCO2增加的病理过程 B.判断呼吸衰竭的血气标准一般为PaO2<60mmHg,伴有或不伴有PaCO2>50mmHg C.呼吸衰竭可分为低氧血症型____和低氧血症伴高碳酸血症型____ D.呼吸衰竭患者____可以只有PaCO2升高而没有PaO2降低 E.根据病程经过不同可分为急性和慢性呼吸衰竭
词汇与结构A ______ is an electronic device that produces a response when it receives a radio-frequency interrogation.测试
Vocabulary 21．I couldn’t ______ cigarettes even though my doctor had repeatedly warned me not to smoke.A. persist B. resist C. insist D. consist2. In many cultures, the shape of the human skull is a ______ that represents death.A. superiority B. symbol C. sympathy D. symptom3. Our party will be held next Saturday. We’ve started sending out ______.A. individualism B. inspections C. interference D. invitations4. My uncle has spent a ______ amount of money on that house --- much greater than he had expected.A. talented B. tender C. tremendous D. truthful5. She worried a lot about her husband’s health because she learned there was no ______ for his disease.A. crime B. crush C. cure D. curriculum6. People living in cities often have the illusion that ______ life is always leisurely and comfortable. In fact, it is not necessarily the case.A. rural B. urban C. metropolitan D. harmonious7. Science, especially computer science, has ______ changes in many aspects of our lives, such as the way we work, study and communicate.A. brought about B. brought into C. brought back D. brought up8. A cyber-education encourages students to argue their points and their perspectives without the _____ of a professor.A. interference B. glance C. inference D. injure9. Absent-mindedness is not at all allowed while you’re working. It’s the sort of work that _____ a high level of concentration.A. calls off B. calls for C. calls at D. call up10. ______ the lack of cooperation between the two sides, the project has made little progress so far.A. According to B. Owing to C. In terms of D. As to11. He had a suspicion that the certificate was not genuine, but on close ____, he realized that it was not forged.A. inspiration B. inspection C. expectation D. emphasis12. Workers usually demand high wages while the boss always seeks high profits — it’s almost impossible to ____ these two aims.A. reconcile B. recognize C. resign D. consist13. It’s not unusual to hear people complaining that educational standards are in ____ rather than on the rise.A. incline B. cline C. online D. decline14. What does the future hold _____ for kids who quit school at an early age?A. on store B. in store C. for store D. out store15. ____, they have never met each other even though they’ve been living in the same street for ten years.A. Oddly enough B. Curiously enoughC. Fortunately enoughD. Fairly enough16. Her greatest ______ is her kindness which has earned her lots of friends in the neighbourhood.A. attitude B. avenue C. attribute D. arrival17. People who cannot ______ colours are said to be colour-blind.A. distinguish between B. distribute betweenC. divide between D. distort between18. She gets lost easily while driving; so now whenever she is uncertain ______ which road to take, she will telephone her husband.A. as a result of B. as to C. as a whole D. as the saying goes19. The two countries are ______ by common interests; so I think their relationship is likely to remain stable in the coming years.A. undone B. unfolded C. uplifted D. united20. The ______ that women should serve as homemakers has already gone out of fashion.A. theory B. principle C. impression D. notion
Vocabulary 31. As the watch she had just bought was a fake, she felt fully ______ in asking for her money back.A. liberal B. probable C. justifiable D. dismal2. The entire village went to the church for Jim’s ________ —— they deeply mourned the death of the young man who died while trying to save a drowning boy.A. burial B. mourning C. ceremony D. funeral3. I disliked that shop assistant because he spoke to me with an easy ________ he treated me as if I were a close friend of his.A. formality B. acquaintance C. familiarity D. similarity4. To make the meat ________ enough for my grandmother, I cooked it for a long time.A. hard B. delicate C. gentle D. tender5. I see teaching as an opportunity to ____ students, not just to give them instructions.A. decline B. comment C. enlighten D. equip6. The committee’s suggestions sound reasonable, yet whether they can be ____ remains a problem.A. objected B. graded C. implemented D. combined7. The second principle is to let the market _______ national land and resources with proper government regulation.A. divide B. allocate C. design D. arrange8. Seeing the movie ____ many of my childhood memories.A. brought down B. brought out C. brought back D. brought up9. Soon after she settled down in the city she realized that a completely new life was ______ before her.A. following up B. opening up C. lighting up D. mounting up10. He explained that his bad temper ______ his lack of sleep; he had been working for three days and nights without any rest.A. accorded with B. resulted from C. yielded to D. built up11. The start of the new year is the perfect time to ______ the past, make resolutions for the future, and think about what the new year will bring.A. open up B. build on C. reflect on D. get out of12. It is ______ listening to what people say and observing how they behave that we’ve strengthened our own capacity to learn about society.A. by means of B. for means of C. in means of D. with means of13. There are two means to ______ knowledge: to get it personally or by second-hand experience.A. bring up B. build up C. make up D. take up14. Absent-mindedness is not at all allowed while you’re working. It’s the sort of work that _____ a high level of concentration.A. calls off B. calls for C. calls at D. call up15. One’s sense of safety comes from familiarity with the environment; so people have the ______ to resist or avoid new situations.A. efficiency B. emergency C. sufficiency D. tendency16.His strange behaviour ______ understanding; I just can not understand it.A. defines B. confines C. obeys D. defies17. He was very tired, but he held ______ till all the work was finished.A. off B. on C. up D. over18. Since it was a school for boys, he seldom had the opportunity to ______ with girls.A. interfere B. insult C. integrate D. interact19. Mary has ______ the ability to communicate with the local people using sign language.A. inquired B. pursued C. acquired D. fascinated20. The brothers’ refusal to work together had brought about this unsatisfactory ______.A. state of mind B. mind of affairs C. case of affair D. state of affairs
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