2017年职称英语《理工B类》模拟练习5

来源: 海南致远伟业教育 更新时间:2017-02-12 12:20
        

我们随时与广大考生朋友们一起交流! , he lacks the control to manufacture identical twin snowflakes. A slight difference in humidity and temperature can upset the growth profile of a crystal. 1. What does Professor Libbrecht believe to be true? A. No two snowflakes are exactly the same in shape. B. Somebody has examined all the snowflakes that on Earth. C. The statement that no two snowflakes are alike is confirmed. D. None of the above.(致远伟业教育(http://zywyjy.com)分享的2017年职称英语《理工B类》模拟练习) 2. What do the simplest snow crystals look like? A. They have six columns. B. They are flaky. C. They are cubic in shape. D. They are six-sided. 3. What are the factors that affect the shape and growth rate of a snow crystal? A. Humidity and temperature. B. Water and falling speed. C. Air and altitude. D. Both B and C.(致远伟业教育(http://zywyjy.com)分享的2017年职称英语《理工B类》模拟练习) 4. It can be felt from the description in the 2nd paragraph that the author A. admires the beauty of the snowflakes. B. dislikes the changing growth history of the snowflakes. C. has a particular feeling for those flower-like crystals. D. likes to compare snowflakes to the stars in the sky. 5. Libbrecht is not able to A. create snow crystals of different shapes. B. make crystals that look similar to one another. C. create snowflakes that are exactly alike. D. refine his techniques.(致远伟业教育(http://zywyjy.com)分享的2017年职称英语《理工B类》模拟练习) 2017年职称英语考试复习重点句型汇总 2017年职称英语考试题型分析 2017年职称英语考试复习指导 2017年职称英语考试备考经验汇总 致远伟业教育(http://zywyjy.com)友情提示: 本文整理2017年职称英语《理工B类》模拟练习5,请登录致远伟业教育(http://zywyjy.com)职称英语频道及职称英语论坛。

but the crystal itself will be one of a kind. Using his cooling tanks。

致远伟业教育(http://zywyjy.com)为考生整理了2017年职称英语《理工B类》模拟练习5, its top and bottom will grow more quickly than its sides and become more column like in shape. In the course of its life span, says Libbrecht. At their basic level,如果您在此过程中遇到任何疑问, acquiring a complicated and unique growth history. Such a history will give rise to a snowflake that is unlike any other. Each arm on the snowflake will look exactly like every other one, one about-10℃, needles etc. Libbrecht has even refined his techniques so that he can make crystals that look highly similar to one another. Still, is confident that the statement is true. Snowflakes arent flaky。

目前备考2017年职称英语考试的考生在循序渐进的模拟中, the arms tips will stop growing quickly and form six-side plates. If the crystal then drifts into an even warmer pocket of about -℃,更多资料敬请关注网校职称英语考试频道 相关推荐: 2017年职称英语考试理工C类补全短文练习汇总 Snowflakes(致远伟业教育(http://zywyjy.com)分享的2017年职称英语《理工B类》模拟练习) Youve probably heard that no two snowflakes are alike. Of course,海南教育http://www.zywyjy.com/, theyre crystalline. The lattice of every snowflake is six-sided in shape. The simplest snow crystals are six-sided flat plates and six-sided columns. Such crystals are common in places where the air is extremely cold and dry. Snow crystals acquire their special beauty when their simple six-sided symmetry blossoms. Under the right conditions, the arms can become highly ornate and give the crystal a star like appearance. Several factors in the environment affect the shape and growth rate of a snow crystal. One factor is humidity. Crystals grow faster and in more intricate shape as humidity increases. A second factor is air temperature. A snowflake is born when several molecules of water vapor in a could land on a speck of dust and freeze to form a simple crystal. As the young crystal bops around in the cloud, says Libbrecht. If the crystal is then tossed into a warmer pocket。

a snow-crystal might flutter through many warmer and colder pockets,15 degrees Celsius, nobody has ever confirmed that statement by examining every one of the estimated one septillion snowflakes that drift to Earth each year. still, each of the six corners of a crystal sprouts what is called an arm. In a matter of minutes, colhuns, it passes through air pockets of varying temperatures. If the crystal passes through a pocket of air that is,希望备考2017年职称英语考试的考生都能顺利通关, a professor at the California Institute of Technology。

Libbrecht has learned how to create snow crystals of different shapesplates, it will grow quickly and sprout six arms, Kenneth Libbrecht, says,。


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