氯霉素眼药水中加人硼酸的主要作用是
B
暂无解析
函数f(x)=2x+a/π2(a﹥0),在(0,+∞)内最小值为f(x0)=12,则x0=
设函数y=sinx^2+2x,求dy
Itisestimatedthat,currently,about50,000speciesbecome_____everyyear.
Undernocircumstances_____anythingthatwillbenefitourselvesbutatthesametimeharmtheinterestsof。
简述汉代的春秋决狱答。