下列生物之间的关系属于合作关系的是（  ）

默写。

①曲径通幽处，____。（常建《题破山寺后禅院》）

②山光悦鸟性，____。（常建《题破山寺后禅院》）

③____，但余钟磬音。（常建《题破山寺后禅院》）

④吴楚东南坼，____。（杜甫《登岳阳楼》）

⑤____，凭轩涕泗流。（杜甫《登岳阳楼》）

⑥油蛉在这里低唱，____。（鲁迅《从百草园到三味书屋》）

⑦还可以摘到覆盆子，____，又酸又甜……（鲁迅《从百草园到三味书屋》）

⑧在这四年里，我历尽艰苦，____，我咬紧了牙，哼都不哼一声。（阿累《一面》）

   Look at the centre circles of Diagram (图)A and Diagram B. Which of the centre circles looks larger? In fact, they are exactly the same size.
Then look at the picture on the right. What do you see? A vase? Or two faces？Does the picture change quickly from one to the other again and again? Maybe or maybe not, but you can never see them at the same time.

   “What’s happening? Is something wrong with my eyes?” You may wonder at what you see. Don’t worry. Here is how it goes:
When we look at things, our eyes send messages to our brains and then our brains interpret（解读）the information. However, sometimes our brains interpret the received information in a wrong way. It seems that our eyes are playing a joke on us. This often happens and we call it “visual illusion(视觉错误)”.
   Movie makers often make use of visual illusions. They make the objects around actors much smaller or bigger than usual. This makes us believe that the actors are much larger or smaller than they usually are. The movies Jurassic Parkand Honey I shrunk the kids just make use of visual illusions.