问题 问答题 简答题

对锚机有哪些要求?

答案

参考答案:

1.有独立的原动机驱动,并能倒转,对液压锚机,应保证与之相连的其他管路不致影响锚机的正常工作;

2.起单锚的公称速度不小于9m/min;

3.能在过载拉力作用下连续工作2min,过载拉力应不小于额定拉力的1.5倍;

4.具有足够功率,能满足在规定的平均速度和额定负载下连续工作30min;

5.能可靠制动。

阅读理解

阅读理解。

     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 suppertime, 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 nickel I earned.

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

self-confidence (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 good-for-nothing." 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. From the dialogue between the boy and his mother, we learn that the mother was _____.

A. excited

B. interested

C. ashamed

D. disappointed

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

A. The war between the boy's parents.

B. The arguing between the boy and his mother.

C. The quarrel between the boy and his customers.

D. The fight between the boy and his father.

5. What is the text mainly about?

A. The early life of a journalist.

B. The early success of a journalist.

C. The happy childhood of the writer.

D. The important role of the writer in his family.

判断题