血清、抗生素、酶制剂等最好的除菌方法是:
A. 100℃30分钟
B. 60℃-62℃30分钟
C. 高压蒸汽灭菌
D. 滤过除菌
E. 紫外线照射法
关于毒力变异,叙述错误的是:
A. 卡介苗是由有毒的牛型结核杆菌经变异而获得的减毒结核菌株
B. 无毒或弱毒的细菌可通过易感机体使毒力增强
C. 有芽胞的细菌失去产生芽胞的能力后其毒力可减弱
D. 属遗传型变异
E. 与大量使用抗生素有关
Section Ashortconversation(30points,3 points each)Directions:In this section, you will hear several conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversations and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A), B), C) and D), and decide which is the best answer.1.A) About 12 o'clock.B) Late in the evening.C) About 2 p.m.D) Early the next morning.2. A) Peaches are in season now.C) The woman didn't know how to bargain.B) She hasn't gotten her grades yet.4.A) Take two pills.B) Forget to take any pills.C) Take five pills.D) Follow the doctor's advice.5.A) Buy an apartment.C) Find a cheaper apartment.D) Move out from the cheap apartment.6.A) The woman should buy some new trousers.C) The woman should eat less.D) The woman should do exercises.7.A) She learns English quickly.B) Her English isn't very good.C) Her English is very good.D) She learns new sentences slowly.8.A) Jane will not leave her job.B) Jane will be sorry.C) Jane will go away.D) The woman should buy Jane a present.[音频]
Section BPassages (35points, 5 points each)Directions:In this section, you will hear several short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C) and D).Passage OneQuestions 11 to 13 are based on the passage you have just heard.11.A) Fried Coke.B) Strawberry ice-cream.C) Strawberry Coke.D) Strawberry syrup.12. A) A batter (面糊) mix made with Coca-Cola syrup.B) A cherry.C) A drizzle of strawberry syrupD) Some strawberries.13.A) Gonzales, who created this new fast food, is a computer analyst.B) The creator tried about 50 different varieties before coming up with his perfect recipe of this new fast food.C) It was sold at $4.50 at the State Fair of Texas.D) It won a prize for coming up with "most creative" new fair food.Passage TwoQuestions 14 to 17 are based on the passage you have just heard.14.A) The weights.B) The wheel.C) The electric light.D) The radio.15.A) Because there was little land left for exploration.B) Because life was too hard for people at the time.D) All of the above.16.A) 1909B) 1926.C) 1928.D) 1930.17.A) Because the people worked very well.B) Because the people were healthier.C) Because there were fewer diseases.