Have you ever dreamed about sending a letter to yourself or your friends in the future?While express
题目
Have you ever dreamed about sending a letter to yourself or your friends in the future?While express mail represents efficiency and speed and is prevalent in China,there is another type of mail emerging as a new business:"future mail."
"The letter should be delivered next `Mother`s Day` and not a day earlier!" Lin Xiaofan,a senior high school student in Hefei,instructs one of the companies offering the service.Lin Xiaofan wrote the letter to her mother in advance to express her love to her mother for next Mother’s Day.
"Offering this service makes people slow down and let them understand the meaning of `time` in another way," said Zheng Zhimin,manager at a "future mail" company in Hefei.Zheng thinks "future mail" letters are "reminders of and catalysts for affection,friendship and love."
Feng Xiao,a youth who feels pressure despite of some achievement in her career,decided to write a letter to herself on her 25th birthday and have it delivered five years later on her 30th b
答案
确定是C
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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