Applicantsshouldnotethatallpositionsare——toAustraliancitizenshiprequirements.
设函数f(x)=ln(3x),则'f(2)=()
设曲线L:f(x,y)=1(f(x,y)具有一阶连续偏导数),过第II象限内的点M和第IV象限内的点N,T为L上从点M到点N的一段弧,则下列小于零的是()
heteachertoldthemsincelight________(travel)fasterthansound,lightning________(appear)togobeforethunder.
设某种元件的使用寿命T的分布函数为