本文导航

• 第1页：第1部分：词汇选项
• 第2页：第2部分：阅读判断

• 第3页：第3部分：概括大意
• 第4页：第4部分：阅读理解

• 第5页：第5部分：补全短文
• 第6页：第6部分：完形填空

　　第3部分：概括大意与完成句子(第23--30题，每题1分，共8分)
　　下面的短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为第2～5段每段选择1个最佳标题；(2)第27～30题要求从所给的6个选项中为每个句子确定1个最佳选项。

Learn about Noble Gases（惰性气体）

　　1 Have you ever ridden on a balloon? Many tourist spots offer balloon rides in order for people to see the beauty of a place from above. A balloon contains a noble gas called hellum（氦）. Formerly, balloons contained hydrogen but hydrogen is very flammable and dangerous www.100ksw.coments are the only ones, www.100ksw.comany important applications. They are widely used in medicine and industries. For instance, liquid Helium is used for superconducting magnets（磁体）. These magnets are very important in physics and medicine. When a doctor suspects that a person’s brain has been damaged, he might request for Magnetic Resonance Imaging(MRI). MRI allows the doctor to “see” the brain, without operating on the patient.
　　 23. paragraph 2________
　　 24. paragraph 3________
　　 25. paragraph 4________
　　 26. paragraph 5________
　　 A. How were noble gases discovered?
　　 B. what is the periodic table?
　　 C. what are the applications of noble gases?
　　 D. How were noble gases understood in the past?
　　 E.What causes the low chemical reactivity of noble gases?
　　 F. What are noble gases?
　　 27. Noble gases are not very chemically .
　　 28. Among the elements of noble gases Helium is the .
　　 29. The required number of electrons in noble gases’outer shell is .
　　 30. MRI may make operating on the patient .
　　 A. complete
　　 B. reactive
　　 C.unnecessary
　　 D. flammable
　　 E. important
　　 F. lightest