题型：问答题 论述题 从下面方框中选出5个单词，将它们填人短文空格内，使短文意思正确、通顺。(注意：每词限用一次，其中有一词多余)vegetables; because; going; difficult; longer; comfortable It's the year 2050 now. Life is very different from life in 2007. There are more people and cars in the world. It's more 1.________ for people to find a job. And it's also more difficult for people to ride in the streets. Most people live 2.________ because they eat healthier food. Nobody eats meat very often 3.________ more and more people know it's important to have a healthy diet. They eat more 4.________and fruit. They don't have to work long hours. They have more free time for sports and 5.________ fora trip. They can also surf the Internet. Every family has more than one computer. g 查看答案
题型：问答题 论述题 关于惩罚，正确的理解是（）。A.惩罚是一种阴性强化物，往往比奖赏的效果小B.惩罚可以改变行为，但其后果较奖赏难以预测C.惩罚都是消除了行为而不是巩固了行为D.当不需要学习者对一个信号反应去逃避惩罚时，惩罚可以是有效的E.惩罚没能提供信息 查看答案