根据单词所给的首字母填写,完成句子.
题目
根据单词所给的首字母填写,完成句子.
1.It's raining outside.Take an u_____with you.
2.Before you post the letter,put a s_____on the envelope.
3.There are many f_____and trees in the park.It's very beautiful.
4.Do more e_____and you will get stronger.
5.Tomorrow is the 24th of December .Let's buy a C_____tree.
答案
umbrella 雨伞
stamp 邮票
flowers 花
exercise 锻炼
Christmas 圣诞
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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