His grandmother is 90 years old.同义句
题目
His grandmother is 90 years old.同义句
答案
楼上第一个答案大错.His grandmother is 90 years old.同义句 = His grandmother's age is 90.= The age of his grandmother is 90.= His grandmother is at the age of 90.= His grandmother is aged 90....
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．
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