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
A、first position of a codon
B、second position of a codon
C、third position of a codon
D、exons
E、untranslated regions
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
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.
A、necessary
B、dumb
C、unconventional
D、profound
A、A.A mooring winch
B、B. A windlass
C、C. A deck crane
D、D. A lifeboat engine
A、know yourself
B、do some research in advance
C、practice answering interview questions
D、get familiar with FAQs (frequently-asked questions)
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 |
A、electronic data interchange; enterprise resource planning
B、computing power; Internet
C、Internet, electronic data interchange
D、computing power; enterprise resource planning
A、tide
B、fashion
C、wave
D、style
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