His name is Jim.His father and mother have six children .Half are boys and half are girls.So Jim has
题目
His name is Jim.His father and mother have six children .Half are boys and half are girls.So Jim has ___ brothers and___ sisters
答案
two brothers
three sisters
Jim 父母有6个孩子,三个是男孩,三个是女孩,
男孩：Jim 和他的两个兄弟
女孩：Jim的三个姐妹
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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．
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