问题 单项选择题 A1/A2型题

常用于牛奶消毒的方法是()

A.超声灭菌法

B.巴斯德消毒法

C.过滤法

D.煮沸法

E.高压蒸汽灭菌法

答案

参考答案:B

解析:巴斯德消毒法可用较低温度杀死病原微生物而保持物品中耐热成分不被破坏,主要用于牛奶的消毒。

填空题
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     I began working in journalism(新闻工作)when I was eight. It was my mother's idea. She wanted me

to "make something" of myself,  and decided I had better start young if I was to have any chance of

keeping up with the competition.

     With my load of magazines I headed toward Belleville Avenue. The crowds were there. There were

two gas stations on the corner of Belleville and Union. For several hours I made myself highly visible,

 making sure everyone could see me and the heavy black letters on the bag that said THE SATURDAY

EVENING POST. When it was supper time, I walked back home.

     "How many did you sell,  my boy?" My mother asked.

     "None."

     "Where did you go?"

     "The corner of Belleville and Union Avenues."

     "What did you do?"

     "Stood on the corner waiting for somebody to buy a Saturday Evening Post."

     "You just stood there?"

     "Didn't sell a single one."

     "My God, Russell!"

     Uncle Allen put in, "Well,  I've decided to take the Post." I handed him a copy and he paid me a

nickle(五分镍币). It was the first nickle I earned.

     Afterwards my mother taught me how to be a salesman. I would have to ring doorbells, address

adults with selfconfidence(自信),  and persuade them by saying that no one, no matter how poor,  

could afford to be without the Saturday Evening Post in the home.

     One day, I told my mother I'd changed my mind. I didn't want to make a success in the magazine

business.

     "If you think you can change your mind like this," she replied, "you'll become a goodfornothing." She

insisted that, as soon as school was over, I should start ringing doorbells, selling magazines. Whenever

I said no, she would scold me.

     My mother and I had fought this_battle almost as long as I could remember. My mother,  dissatisfied

with my father's plain workman's life,  determined that I would not grow up like him and his people. But

never did she expect that,  forty years later,  such a successful journalist as me would go back to her

husband's people for true life and love.

1. Why did the boy start his job young?

A. He wanted to be famous in the future.

B. The job was quite easy for him.

C. His mother had high hopes for him.

D. The competition for the job was fierce.

2.  From the dialogue between the boy and his mother, we learn that the mother was________.

A. excited  

B. interested

C. ashamed  

D. disappointed

3. What did the mother do when the boy wanted to give up?

A. She forced him to continue.

B. She punished him.

C. She gave him some money.

D. She changed her plan.

4.  What does the underlined phrase "this battle" (last paragraph) refer to?

A. The war between the boy's parents.

B. The argument between the boy and his mother.

C. The quarrel between the boy and his customers.

D. The fight between the boy and his father.