甲：我们这里的冬天滴水成冰，呵气成霜；夏天农作物茁壮成长，大地笼罩“青纱帐”，一片新绿．

乙：我们那里放眼望去，是茫茫的草原，到处牛羊成群．

甲和乙分别所在的地区是（　　）

   Science has told us so much about the moon that it is quite easy to form an idea of what it would be like to go there. It is certainly not a friendly place. As there is no air or water, there can be no life of any kind. Mile after mile there are only plains(平原) of dust with mountains around them. Above, the sun and stars shine in the black sky. If you step out of the mountains shadows, it will mean moving from terrible cold into great heat. The moon is also a very silent(安静的) world, for sound waves (声波)can only travel through air. But from the moon, you can see a friendly sight(景色). Our earth is shining more brightly than the stars. It looks like a large ball, coloured blue and green and brown.

已知关于x的二次函数y=ax²+bx+c的图象经过点（﹣2，y₁），（﹣1，y₂），（1，0），且y₁＜0＜y₂，对于以下结论：

①abc＞0；②a+3b+2c≤0；③对于自变量x的任意一个取值，都有 $\frac{a}{b}$ x²+x≥﹣ $\frac{b}{4a}$ ；④在﹣2＜x＜﹣1中存在一个实数x₀，使得x₀=﹣ $\frac{a+b}{a}$ ，

其中结论错误的是____ （只填写序号）．

某研究性学习小组制作了以下4个密闭的生态瓶，放在一定的环境中。根据你学过的知识判断，下列四个瓶中生物的生存时间最长的是(    )