设三角区域D由直銭x+8y-56=0,x-6y+42=0与kx-y+8-6k=0(k<0)围成，则对任意的(x,y)，有㏒(x2+y2)≤2

(1)k∈(-∞,-1]

(2)k∈(-1,1/8]

Thosewho’dliketovisittheexhibition________(sign)yournameshere.

Johnsaysthathispresentjobdoesnotprovidehimwithenough______forhisorganizingability.

About20ofthepassengerswhowereinjuredinaplanecrasharesaidtobein_____condition．

有甲，乙两袋奖券，获奖率分别为p和Q值。某人从两袋中各随机抽取1张奖券，则此人获奖的概率不小于3/4。

（1）已知p+q=1

（2）已知PQ=四分之一