Human vision like that of other primates has evolved in an arboreal environment. In the dense complex world of a tropical forest, it is more important to see well that to develop an acute sense of smell. In the course of evolution members of the prim

发表于:2018-12-30 / 阅读(72) / 评论(0)

考研背诵50篇

考研背诵50篇——45.The source of Energy

A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Sun's very center. It is here that is to be found the source of the energy that the Sun constantly pours out into space as light and h

发表于:2018-12-30 / 阅读(85) / 评论(0)

考研背诵50篇

考研背诵50篇——44.Obtaining Fresh water from icebergs

The concept of obtaining fresh water from icebergs that are towed to populated areas and arid regions of the world was once treated as a joke more appropriate to cartoons than real life. But now it is being considered quite seriously by many nations,

发表于:2018-12-30 / 阅读(78) / 评论(0)

考研背诵50篇

考研背诵50篇——43.Statistics

There were two widely divergent influences on the early development of statistical methods. Statistics had a mother who was dedicated to keeping orderly records of government units (states and statistics come from the same Latin root status) and a ge

发表于:2018-12-30 / 阅读(72) / 评论(0)

考研背诵50篇

考研背诵50篇——42.Coal-fired power plants

The invention of the incandescent light bulb by Thomas A. Edison in 1879 created a demand for a cheap, readily available fuel with which to generate large amounts of electric power. Coal seemed to fit the bill, and it fueled the earliest power statio

发表于:2018-12-30 / 阅读(91) / 评论(0)

考研背诵50篇

考研背诵50篇——41.American black bears

American black bears appear in a variety of colors despite their name. In the eastern part of their range, most of these brown, red, or even yellow coats. To the north, the black bear is actually gray or white in color. Even in the same litter, both

发表于:2018-12-30 / 阅读(80) / 评论(0)

考研背诵50篇

考研背诵50篇——50. Cells and Temperature

Cells cannot remain alive outside certain limits of temperature and much narrower limits mark the boundaries of effective functioning. Enzyme systems of mammals and birds are most efficient only within a narrow range around 37C; a departure of a few

发表于:2018-12-30 / 阅读(83) / 评论(0)

考研背诵50篇

备战英语六级听力练习题第3期

Passage One Questions 11 to 14 are based on the passage you have just heard. 11. A) Classmates. B) Colleagues. C) Boss and secretary. D) PR representative and client. 12. A) He felt his assignment was tougher than Sue's. B) His clients complained abo

发表于:2018-12-30 / 阅读(165) / 评论(0)

英语六级听力练习集锦

备战英语六级听力练习题第1期

1. A) Furnished apartments will cost more. B) The apartment can be furnished easily. C) The apartment is just what the man is looking for. D) She can provide the man with the apartment he needs. 2. A) Mr. Johnson's ideas are nonsense. B) He quite agr

发表于:2018-12-30 / 阅读(226) / 评论(0)

英语六级听力练习集锦

备战英语六级听力练习题第2期

6. A) It is based on a lot of research. B) It can be finished in a few weeks' time. C) It has drawn criticism from lots of people. D) It falls short of her supervisor's expectations. 7. A) Karen is very forgetful. B) He knows Karen better now. C) Kar

发表于:2018-12-30 / 阅读(203) / 评论(0)

英语六级听力练习集锦

英语作文四、六级考试万能作文 15Band4January1997

[00:00.00]Practice Makes Perfe [00:02.77]As the saying goes,practice makes perfec [00:07.89]Whatever you do,you are certain to aim at perfectio [00:12.15]But perfection lies in practic [00:15.88]Without practice,you can never expect to be really good

发表于:2018-12-30 / 阅读(83) / 评论(0)

英语六级听力练习集锦

英语作文四、六级考试万能作文 24Band6June1997

[00:00.00]My View on Job-Hoppi [00:02.66]Different people have different attitudes towards their wor [00:06.69]Some prefer to choose one occupation as their lifelong caree [00:12.17]To a devoted scientist,theoretical reasoning and experiments are mos

发表于:2018-12-30 / 阅读(73) / 评论(0)

英语六级听力练习集锦

英语作文四、六级考试万能作文 30BandrJune1997

[00:00.00]Getting to Know the World Outside the Camp [00:03.79]Nowadays,college students in growing numbers are seen waiting on tables ,clerking in stores,advertising in streets,teaching in families and doing whatever work they can fin [00:17.74]Why

发表于:2018-12-30 / 阅读(73) / 评论(0)

英语六级听力练习集锦

英语作文四、六级考试万能作文 1Band4December1997

[00:00.00]Harmfulness of Fake Commoditi [00:03.08]With rapid economic development,fake commodities prevail in many places of our countr [00:09.77]Some profiteers,regardless of people's interests,can't wait to make a fortune;they just take risks makin

发表于:2018-12-30 / 阅读(76) / 评论(0)

英语六级听力练习集锦

英语作文四、六级考试万能作文 2Band6January1997

[00:00.00]Haste Makes Was [00:02.98]Haste Makes Was [00:05.83]This is a proverb full of logi [00:09.51]If we are to accomplish anything,we must do it step by ste [00:15.05]If we hope to achieve our desired goal,we have to do some solid,steady ,and do

发表于:2018-12-30 / 阅读(77) / 评论(0)

英语六级听力练习集锦

英语作文四、六级考试万能作文 34BandJune1997

[00:00.00]Is Television a Blessing or a curs [00:04.94]Now,it is generally accepted that television plays an important part in people's live [00:12.46]But there is an ongoing heated discussion as to whether television is a blessing or a curs [00:22.3

发表于:2018-12-30 / 阅读(78) / 评论(0)

英语六级听力练习集锦

英语作文四、六级考试万能作文 8Band46June1998

[00:00.00]Do Lucky NumbersReally Bring Good Luc [00:04.31]Some peple say that some numbers will bring them good luck [00:08.62]take 8 for exampl [00:11.34]The Chinese pronunciation of the number8has almost the same sound as that of the chinese charac

发表于:2018-12-30 / 阅读(76) / 评论(0)

英语六级听力练习集锦

英语作文四、六级考试万能作文 4Band6january

[00:00.00]How to solve the Problem of Heavy Traff [00:04.68]With the development of industry and the growth of population,heavy traffic has become a serious problem in citie [00:14.16]Large numbers of bikes,motorcycles,cars and buses are making the s

发表于:2018-12-30 / 阅读(81) / 评论(0)

英语六级听力练习集锦

英语作文四、六级考试万能作文 26Band6June

[00:00.00]How to Solve the Housing Problem in Big Citie [00:04.49]The housing problem in big cities has become more and more seriou [00:09.67]If asked which is a better solution to this problem,putting up more tall buildings or building underground h

发表于:2018-12-30 / 阅读(65) / 评论(0)

英语六级听力练习集锦

英语作文四、六级考试万能作文 16Band46January1999

[00:00.00]Don't Hesitate to SayN [00:03.21]Have you ever said Noto anyone who asks you for hel [00:07.81]Once a close friend of mine asked me to take an English exam for him,saying that he would get promoted if I could help him pass the exa [00:18.86

发表于:2018-12-30 / 阅读(79) / 评论(0)

英语六级听力练习集锦