A rotary current sets through all directio

题型:单项选择题

问题:

A rotary current sets through all directions of the compass. The time it takes to complete one of these cycles is approximately().

A.3 hours

B.6 1/2 hours

C.12 1/2 hours

D.25 hours

考点:航海英语海洋学基本知识海洋学基本知识题库
题型:单项选择题

阅读理解。

                                                        How I Turned to Be Optimistic

     I began to grow up that winter night when my parents and I were returning from my aunt's house, and

my mother said that we might soon be leaving for America. We were on the bus then. I was crying, and some

people on the bus were turning around to look at me. I remember that I could not bear the thought of never

hearing again the radio program for school children to which I listened every morning.

     I do not remember myself crying for this reason again. In fact, I think I cried very little when I was saying

goodbye to my friends and relatives. When we were leaving I thought about all the places I was going to see

the strange and magical places I had known only from books and pictures. The country I was leaving never to

come back was hardly in my head then.

     The four years that followed taught me the importance of optimism, but the idea did not come to me at

once. For the first two years in New York I was really lost - having to study in three schools as a result of

family moves. I did not quite know what I was or what I should be. Mother remarried, and things became

even more complex for me. Some time passed before my stepfather and I got used to each other. I was often

sad, and saw no end to "the hard times".

     My responsibilities in the family increased a lot since I knew English better than everyone else at home. I

wrote letters, filled out forms, translated at interviews with Immigration officers, took my grandparents to the

doctor and translated there, and even discussed telephone bills with company representatives.

     From my experiences I have learned one important rule:almost all common troubles eventually go away!

Something good is certain to happen in the end when you do not give up, and just wait a little! I believe that my

life will turn out all right, even though it will not be that easy.

1. How did the author get to know America?[ ]

A. From her relatives.

B. From her mother.

C. From books and pictures.

D. From radio programs.

2. Upon leaving for America the author felt _____. [ ]

A. confused

B. excited

C. worried

D. amazed

3. For the first two years in New York, the author _____.[ ]

A. often lost her way

B. did not think about her future

C. studied in three different schools

D. got on well with her stepfather

4. What can we learn about the author from Paragraph 4? [ ]

A. She worked as a translator.

B. She attended a lot of job interviews.

C. She paid telephone bills for her family.

D. She helped her family with her English.

5. The author believes that _____. [ ]

A. her future will be free from troubles

B. it is difficult to learn to become patient

C. there are more good things than bad things

D. good things will happen if one keeps trying

题型:单项选择题

设立股份有限公司,在中国境内有住所的发起人应占发起人总数的()以上

A、四分之一

B、三分之一

C、三分之二

D、半数

题型:单项选择题

“自顶向下”开发信息系统的策略最适合于下列哪一类系统

A.大型信息系统

B.小型信息系统

C.半结构化信息系统

D.非结构化信息系统

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采样时所需流量为15~30L/min,并保持流速稳定,采样流量应在开始采样时迅速校正到()的规定值。

A、10L/min

B、20L/min

C、15L/min

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