问题
选择题
板块移动的动力来源于
A．地球自转
B．月球的引力
C．地球内部的热对流
D．海水的流动
答案
C
地球内部因为放射性元素蜕变，产生大量的热，驱使热对流发生成为带动板块的动力来源。
搜题请搜索小程序“爱下问搜题”
板块移动的动力来源于
A．地球自转
B．月球的引力
C．地球内部的热对流
D．海水的流动
C
地球内部因为放射性元素蜕变，产生大量的热，驱使热对流发生成为带动板块的动力来源。
| 完形填空。 | ||||
| During his college years, Rogers spent a summer in an Idaho logging (砍伐原木) camp. When the boss had to 1 for a few days, he put Rogers in charge. "What if the men 2 to follow my orders?" Rogers asked. He 3 Tony, a worker who was always giving the other men a(n) 4 time. "Fire them," the boss said. Then, as if 5 Rogers' mind, he added, "I think you want to send Tony away if you 6 the chance. I'd feel 7 about that. I know he 8 everybody and everything. But he is a good worker. He comes 9 and leaves last. There has not been a(n) 10 for eight years on the hill where he works. The next day Rogers went to Tony and 11 to him. "Tony, I was going to ask you to leave if you argued with me, 12 I want you to know now I'm not," he told Tony, adding what the boss had said. When he finished, Tony cried. "Why didn't 13 tell me those words eight years ago?" That day Tony worked 14 than ever before- and he smiled! Rogers went back to 15 after that summer. Twelve years later, he 16 Tony again. He was the boss of one of the 17 logging companies in the West. Rogers asked him how he had achieved such great 18 . Tony replied, "Do you still remember what you told me twelve years ago? That one minute 19 my whole life." Have you got one minute to thank someone? One minute. It can make a 20 for a lifetime. | ||||
|