【单选题】He would much ______ it if you could do him the favor.
【单选题】He would much _____ it if you could give him a hand. [ ]
【单选题】He would much ______ it if you could do him the favor.
【简答题】(1)已知y 1 =x+3,y 2 =2-x ,当x取何值时,y 1 比2y 2 大5; (2)若规定:①{m}表示大于m的最小整数:例如{3}=4,{-2.6}=-2;②〔m〕表示不大于m的最大整数:例如〔5〕=5,〔-7.6〕=-8; 则2{m}-〔m〕=6成立的整数m是多少?
【单选题】已知二次曲线 x 2 4 + y 2 m =1,则当m∈[-2,-1] 时,该曲线的离心率的取值范围是( )
【单选题】函数 f(x)= x 5k- k 2 (k∈Z) 是幂函数,当x>0时,f(x)是增函数,则k的取值集合是( )
【单选题】He would much ______ it if you could do him the favor.
【单选题】如果你生活在恩施这片神奇的土地上,你普通的一日三餐就已经完成了补硒,你的硒摄入水平就可以达到( )的标准。