已知函数y=a x-1 (a>0,且a≠1)的图象恒过定点A,若点A在一次函数y=mx+n的图象上,其中m,n>0,则 1 m + 1 n 的最小值为______.
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【简答题】句型转换 1. Jane isn't good at Science, I think. (宾语从句) I ______ think Jane ______ ______ at Science. 2. The woman who is talking with our head teacher is my mother. (同义句) The woman ______ ______ our head...