The world is a beautiful place in our eyes． But does it look the same through the eyes of animals？

Dogs can't see as many colors as we can． They can see blues， browns and yellows． They have fewer color ﹣ detecting cells（色彩感知细胞）than humans do．

Spiders have eight pairs of eyes． They can see more colors than humans． They can see ultraviolet light（紫外线）． So they see things clearer than we do，Rats can move one eye in different directions while the other eye stops moving． It is to see their enemies better． They can't see many colors． It' s not necessary because they mainly come out at night， They are good at seeing bright light．

Horses have eyes on either side of their head． So they see wider than humans． They have a blind spot（盲点）in front of their nose． They can't see as many colors as humans do． They can see greens and blues， but most of the time they see grays．

（1）What colors can dogs see？ （不超过9个词） 　　

（2）How many eyes does a spider have？ （不超过8个词） 　　

（3）When do rats mainly come out？ （不超过8个词） 　　

（4）Why do horses see wider than humans？ （不超过12 个词） 　　

（5）Which topic is better， "World through animals' eyes" or "Different kinds of animals"？（不超过8个词）