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 本文導(dǎo)航

• 第1頁：第1部分：詞匯選項(xiàng)
• 第2頁：第2部分：閱讀判斷

• 第3頁：第3部分：概括大意
• 第4頁：第4部分：閱讀理解

• 第5頁：第5部分：補(bǔ)全短文
• 第6頁：第6部分：完形填空

　　第3部分：概括大意與完成句子(第23--30題，每題1分，共8分)
　　下面的短文后有2項(xiàng)測試任務(wù)：(1)第23～26題要求從所給的6個(gè)選項(xiàng)中為第2～5段每段選擇1個(gè)最佳標(biāo)題；(2)第27～30題要求從所給的6個(gè)選項(xiàng)中為每個(gè)句子確定1個(gè)最佳選項(xiàng)。

Learn about Noble Gases（惰性氣體）

　　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.haxgd.coments are the only ones, www.haxgd.comany important applications. They are widely used in medicine and industries. For instance, liquid Helium is used for superconducting magnets（磁體）. 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