在“探究动物的学习行为”实验中，学习能力最强的动物是（ ）
A．蚯蚓
B．大山雀
C．猪
D．大猩猩
学习行为是动物出生后通过学习得来的行为．动物建立学习行为的主要方式是条件反射．参与神经中枢是大脑皮层，不是与生俱来的，而是动物在成长过程中，通过生活经验和“学习”逐渐建立起来的新的行为．动物通过后天的学习，大大地提高了适应复杂环境的学习能力．动物学习能力的大小与其进化的程度呈正相关，动物的种类越高等，学习能力就越强，学习行为所占的比重就越大．蚯蚓、大山雀、猪、大猩猩最高等的是大猩猩，因此学习能力最强的动物是大猩猩．
故选：D．
阅读短文，根据短文内容，从短文后的五个选项中选出能填入空白处的最佳选项。选项中有一项为多余选项。 Many people think self-confidence is the key to a happy, successful life. But where does self-confidence come from? 小题1: . I’m Lucy. Self-confidence means that I can do something well. It’s even better if someone else tells you that you’re good at something, too. When people listen to me and pay attention to my ideas, I know they like me. When people don’t listen, I sometimes feel sad. 小题2: . I’m Jeff. Respect from my family and friends makes me feel the best. I don’t care if I’m the best football player, or I don’t get the highest grade on a test, or don’t succeed at everything I do. 小题3: . If someone says something unkind about you, you don’t mind that much because you know they’re wrong—that means you have self-confidence. I’m Sue. I really feel good when my mum gives me a hug and says,“Have a nice day!”before I leave the house. Also, one day in a store I asked a salesman where to find something, and to my surprise, he said,“You have a beautiful smile.” For the rest of the day I was happy. These kinds of things have to come naturally and from the heart, but they make a big difference in the way a person feels. 小题4: . Believe that no matter who you are, you can build your own self-confidence.
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