据如图回答问题：

下列四个集合：

①A={x|y=x²+1}；

②B={y|y=x²+1，x∈R}；

③C={（x，y）|y=x²+1，x∈R}；

④D={不小于1的实数}．

其中相同的集合是（   ）

动物的行为从获得的途径上划分，都可以分为先天性行为和学习行为。（判断对错）

根据短文内容，从A、B、C、D四个选项中选择一个最佳答案。
Passage 1
     Steven Jobs, the designer of Apple Computer, was not clever when he was in school. At that time, he was not a good student and he always made troubles with his schoolmates. When he went into college, he didn't change a lot. Then he dropped out（退学）. But he was full of new ideas.
　 After he left college, Steven Jobs worked as a video game designer. He worked there for only several months and then he went to India. He hoped that the trip would give him some new ideas and give him a change in his life.
　 Steven Jobs lived on a farm in California for a year after he returned from India.
　 In 1975, he began to make a new type of computer. He designed the Apple Computer with his friend in his garage. He chose the name “Apple” just because it could help him to remember a happy summer he once spent in an apple tree garden.
His Apple Computer was so successful that Steven Jobs soon became famous all over the world .
He often said, “I live in order to change the world, there aren't any other reasons. The only way to have a great achievement is to love your own career. If you can't find your  favorite career ,go on looking for it and never give up.”
     This is Steven Jobs, though he is dead, his spirit and achievements still influence our lives.

我们经常说“壮苗必须先壮根”，根的生长速度很快，栽种在泥土中的花卉，在一段时间后会长出许许多多的根．在根尖的下列结构中，能使根不断变长的是（　　）