根据首字母完成句子
题目
根据首字母完成句子
1The piano is a kind of m( ) instrument.
2Every year,water sports,e( ) swimming and surfing,attact large numbers of tourists to the island.
答案
1.The piano is a kind of m(ain) instrument. 钢琴是一种(主要的)乐器.2.Every year, water sports, e(spcially) swimming and surfing, attract large numbers of tourists to the island. 每年,水上运动,(尤其)...
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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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