现今生活在地球上的爬行动物不能再进化成为鸟类和哺乳类．______．_爱下问搜题

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问题解答题

现今生活在地球上的爬行动物不能再进化成为鸟类和哺乳类．______．

答案

脊椎动物的进化历程：原始鱼类→原始两栖类→原始爬行类→原始鸟类、哺乳类．原始鸟类和哺乳类是原始的爬行类进化而来的．现在的爬行动物不能够进化成鸟类和哺乳类．就像现在的类人猿进化不成人一样．有两方面的原因：在内因方面，现在的爬行类在形态结构和生理特点方面同古代的爬行动物有很大的区别；在外因方面，现在的地球环境与古代爬行类向鸟类和哺乳类进化时的情况大不相同，也就是说现在的爬行类不具备向鸟类和哺乳类进化的条件．

故答案为：√

完形填空

A group of class friends, rich and successful, got together to visit their old university professor. They    a lot. Soon their conversation turned into complaining         stress in work and life．
Offering his guests coffee, the professor went to the       and returned with a large pot of coffee and some      —porcelain(瓷的), plastic, glass, crystal(水晶的).Some were cheap, while others were expensive. He told them to         one for themselves to the coffee．
When all the students had a cup of coffee in each      ,the professor said：“If you noticed，everyone had chosen the nice looking expensive cups ,      behind the cheap ones. While it is natural for you to choose only the best for yourselves, that’s        you always feel so stressed out．Be sure that the cup itself does not make the coffee taste      . What all of you really wanted was coffee, not the cup,      you consciously (自觉地) chose the best cups．Now consider this：Life is the       ; the jobs, money and success are the cups. They are only     to hold life, and the type of cup does not mean anything. Sometimes, by concentrating only        the cup, we        to enjoy the coffee God has made for us. ”
The happiest people don’t have the best of everything．They just make the best of everything．Live simply．Love gently．Care deeply．Speak kindly．Leave the       to God．

A．living-room

C．waiting-room

填空题

（）可以协助营业厅经理主持每天的班前例会，及时传达公司精神及业务通知。