问题
多项选择题
在科学上，高能物理和天体物理的研究证明，地球上的核反应、元素蜕变现象与宇宙天体运动存在共同规律，这说明这两种现象之间具有( )。
A．间接的联系
B．内在的联系
C．偶然的联系
D．本质的联系
E．外部的联系
答案
参考答案：B,D
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在科学上，高能物理和天体物理的研究证明，地球上的核反应、元素蜕变现象与宇宙天体运动存在共同规律，这说明这两种现象之间具有( )。
A．间接的联系
B．内在的联系
C．偶然的联系
D．本质的联系
E．外部的联系
参考答案：B,D
| 阅读下列短文，从四个选项中选出能回答所提问题或完成所给句子的最佳答案。 |
| The computer age is making an army of robots-machines that are directed by electronic (电子的) brains and which replace human labor in industrial operations. Many are man-made arms which reach into areas man enters only at the cost of his life, such as the inside of a nuclear reactor (核反应堆). Already in 1980, there were over 8000 such robots working in industrial plants throughout the world. The big change over to the robot, however, is likely to come only when their costs go down while workers' wages continue to rise. |
| 1. Sentence 1 means that robots are used mainly____. |
[ ] |
| Ａ：to fight wars Ｂ：to operate computers Ｃ：to direct electronic brains Ｄ：to take the place of human workers |
| 2. The shape of many robots already in use looks like a human____. |
[ ] |
| Ａ：brain Ｂ：arm Ｃ：hand Ｄ：eye |
| 3. The passage makes it clear that a very valuable use of many robots is to _____ . |
[ ] |
| Ａ：act as a teacher to children Ｂ：replace the human brain in making computers Ｃ：help doctors in medical operations Ｄ：do tasks very dangerous for humans to do |
| 4. Which of the following about the last sentence is true? |
[ ] |
| Ａ：Robots are becoming cheaper all the time. Ｂ：Robots are becoming more and more expensive. Ｃ：The cost of a human worker is higher than that of the average (普通的) robot. Ｄ：The cost of the average robot is higher than that of a human worker. |
| 5. The writer thinks that the widespread replacement of human labor by industrial robots _____. |
[ ] |
| Ａ：has already begun worldwide Ｂ：is starting especially in the developing nations Ｃ：is being put off mainly for economic (经济的) reasons Ｄ：will not take place before the end of this century |