he looks up ()the sky and finds a plane above.A our of B from to C into D above.另译全句
题目
he looks up ()the sky and finds a plane above.A our of B from to C into D above.另译全句
答案
答案选C into
look up into the sky 抬头望向天空
翻译:他抬头望向天空,发现有一架飞机飞过.
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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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