英语翻译
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英语翻译
Death Valley is one of the most famous deserts in the United States,covering a wide area with its alkali(强碱) sand.Almost 20 percent of this area is well below sea level,and Badwater,a salt water pool,is about 280 feet below sea level and the lowest point in the United states.
Long ago the Panamint Indians called this place “Tomesha”--- the land of fire.Death Valley’s present name dates back to 1849,when a group of miners coming across from Nevada became lost in its unpleasantness and hugeness and their adventure turned out to be a sad story.Today Death Valley has been declared a National Monument and is crossed by several well-marked roads where good services can be found easily.Luckily the change created by human settlement has hardly ruined the special beauty of this place.
Here nature created a lot of surprising scenes,almost like the sights on the moon,ever-changing as the frequent wind moves the sand about,showing the most unusual colors.One of the most astonishin
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举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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