英语翻译
题目
英语翻译
why is it important that the plane landed at a place higher than where it took off?
because it meant that the plane didn't crash
because it meant that the plane didn't just glide
because it meant that everyone could see the plane
because it meant that the pilot had landed safely
答案
为什么飞机着陆地点比起飞点高如此重要
因为这意味着飞机没有坠落
因为这意味着飞机不是仅仅滑行
因为这意味着大家能够看到这架飞机
因为这意味着飞机员安全着陆
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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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