如果执行程序框图，那么输出的S等于 （   ）

解方程：
（1）  x²-6x=0                             （2）x²+8x-9=0

在甲地旅游最有可能看到的地理景观是（    ）

如图为某二倍体生物细胞分裂某一时期示意图，1、2、3、4代表染色体，a、a′、b、b′代表染色单体，该生物没有发生突变且正常 分裂，则下列描述正确的是（　　）

Protect Wild Animals

    Animals are our good friends．We live in the same Earth．Animals and people can't  be separated from each other．But some animals are getting less and less．So it's important to us to protect animals，especially wild animals．Some people kill wild animals because of money．It's wrong．Now people need more places to live in．We explore the forest．  Animals have less places to live in．The number of wild animals decreases year by year．So we should protect wild animals．