以：A Zoo-keeper为题写话,不少于6句,至少3种句型
题目
以：A Zoo-keeper为题写话,不少于6句,至少3种句型
答案
June 4th Sanday Fine This morning my parents and I went to visit Ningbo Youngor Zoo and we had a picnic there .We had a big lunch on the grass but some food left after we ate up. “Throw the left food...
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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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