题目内容 (请给出正确答案)
[主观题]

Which region of a gene should have the highest rates of substitution?

A、first position of a codon

B、second position of a codon

C、third position of a codon

D、exons

E、untranslated regions

提问人:网友it_nimo 发布时间:2022-01-07
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更多“Which region of a gene should …”相关的问题
第1题
Which of the following topics are more likely to be studied by a macroeconomist than by a microeconomist?

A、the effect of taxes on the prices of airline tickets, the profitability of automobile-manufacturing firms, and employment trends in the food-service industry

B、the price of beef, wage differences between genders, and antitrust laws

C、how consumers maximize utility, and how prices are established in markets for agricultural products

D、the percentage of the labor force that is out of work, and differences in average income from country to country

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第2题
Whether work should be placed among the causes of happiness or among the causes of unhappiness may perhaps be regarded as a doubtful question. There is certainly much work which is exceedingly weary and an excess of work is always very painful. I think, however, that, provided work is not excessive in amount, even the dullest work is to most people less painful than idleness. There are in work all grades, from mere relief of tedium up to the profoundest delights, according to the nature of the work and the abilities of the worker. Most of the work that most people have to do is not in itself interesting, but even such work has certain great advantages. To begin with, it fills a good many hours of the day without the need of deciding what one shall do. Most people, when they are left free to fill their own time according to their own choice, are at a loss to think of anything sufficiently pleasant to be worth doing. And whatever they decide, they are troubled by the feeling that something else would have been pleasanter. To be able to fill leisure intelligently is the last product of civilization, and at present very few people have reached this level. Moreover the exercise of choice is in itself tiresome. Except to people with unusual initiative it is positively agreeable to be told what to do at each hour of the day, provided the orders are not too unpleasant. Most of the idle rich suffer unspeakable boredom as the price of their freedom from toil. At times they may find relief by hunting big game in Africa, or by flying round the world, but the number of such sensations is limited, especially after youth is past, Accordingly the more intelligent rich men work nearly as hard as if they were poor, while rich women for the most part keep themselves busy with innumerable trifles of those earth-shaking importance they are firmly persuaded.

Work therefore is desirable, first and foremost, as a preventive of boredom, for the boredom that a man feels when he is doing necessary though uninteresting work is as nothing in comparison with the boredom that he feels when he has nothing to do with his days. With this advantage of work another is associated, namely that it makes holidays much more delicious when they come. Provided a man does not have to work so hard as to impair his vigor, he is likely to find far more zest in his free time than an idle man could possibly find.

The second advantage of most paid work and of some unpaid work is that it gives chances of success and opportunities for ambition. In most work success is measured by income, and while our capitalistic society continues, this is inevitable. It is only where the best work is concerned that this measure ceases to be the natural one to apply. The desire than men feel to increase their income is quite as much a desire for success as for the extra comforts that a higher income can acquire. However dull work may be, it becomes bearable if it is a means of building up a reputation, whether in the world at large or only in one's own circle.

What is the author's opinion about work?

A.Work can keep people busy as if they were poor.

B.Work is a cause of the greatest delight of life.

C.Work is very tiresome, especially when too excessive.

D.Work can at least give relief from boredom.

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第3题
The mother's behavior has a _________ impact on the developing child.

A、necessary

B、dumb

C、unconventional

D、profound

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第4题
Bhutan is in South Asia, and is the smallest country in the subcontinent, with an estimated population of 174,700 .
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第5题
The SMS should provide for specific measures aimed at promoting the ______of equipment or systems the sudden operational failure of which may result in hazardous situations.

A、A.A mooring winch

B、B. A windlass

C、C. A deck crane

D、D. A lifeboat engine

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第6题
The purpose of Task 3 is to help you to __________?

A、know yourself

B、do some research in advance

C、practice answering interview questions

D、get familiar with FAQs (frequently-asked questions)

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第7题
完型填空????The aim of writing a letter of applica...
完型填空
The aim of writing a letter of application is to help you to "sell" yourself.It should state

__1__the job you want,and should tell what your abilities are and what you have __2__.It

should be simple,human,personal and brief without __3__out any necessary fact.

In writing a letter of application,bear in mind that the things a possible employer is most

__4__to want to know about are your qualifications,your achievements and your aims.The

opening paragraph is perhaps the most important part.If the first few sentences fail to

__5__the reader's attention,the rest of the letter may not be __6__at all.Try to key your

opening remarks to the needs or interests of the employer not to your own need or desires.For

example,instead of beginning with "I saw your __7__in today's paper."you might

say"I have made a careful study of your advertising during the past six months"or "I

have made a survey in my neighbourhood to find out how many housewives __8__your

product and why they like it."

Try to __9__generalities.Be clear about the kind of job for which you are now

__10__.College graduates looking for their first positions often ask "What can I __11__in a

letter?Employers want experience,which,naturally,no __12__has."The answer is that

everything you have ever done is __13__.

It is important to write a good strong closing for your letter.__14__a specific request for an

interview of give the possible employer something definite to do or expect.An excellent

__15__is to enclose(内附)a stamped,selfaddressed envelope with your letter.That makes it

easier for a possible employer to get in touch with you.

(    )1. A.clearly

(    )2. A.found

(    )3. A.sending

(    )4. A.probable

(    )5. A.pay

(    )6. A.kept

(    )7. A.advertisement

(    )8. A.change

(    )9. A.avoid

(    )10. A.losing

(    )11. A.offer

(    )12. A.worker

(    )13. A.success

(    )14. A.Make

(    )15. A.result

B. carefully

B. done

B. taking

B. possible

B. win

B. continued

B. report

B. make

B. remember

B. applying

B. supply

B. beginner

B. development

B. Ask

B. decision

C. obviously

C. known

C. leaving

C. likely

C. show

C. written

C. article

C. sell

C. protect

C. preparing

C. mean

C. owner

C. practice

C. State

C. promise

D. easily

D. heard

D. picking

D. able

D. fix

D. read

D. introduction

D. use

D. gain

D. fitting

D. provide

D. manager

D. experience

D. Get

D. idea

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第8题
Two key factors, ____ and ____, have sparked much of the technological change affecting supply chains.

A、electronic data interchange; enterprise resource planning

B、computing power; Internet

C、Internet, electronic data interchange

D、computing power; enterprise resource planning

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第9题
We have to catch the _________ now or we will be left behind in the future.

A、tide

B、fashion

C、wave

D、style

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