几个单词辨析
题目
几个单词辨析
dozy和lazy hotel和hostel 的区别?
答案
dozy:not looking or feeling awake
昏昏欲睡的,困倦的
lazy：not involving much energy or activity.slow and relaxed
无精打采的,懒洋洋的
前一个强调的是困
hotel：a building where people stay,usually for a short time,
paying for their rooms and meals
旅馆,旅社,饭店
hostel：a building that provides cheap accommodation and meals
to students,workers or travellers
宿舍,招待所（提供廉价服务）
后者强调廉价
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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