【正文】 in the strictest sense of the world. It had no intelligence， no means of mobility， no methods of defense in the outside world. It is fragile， easily killed by mon household bleach （漂白劑） and even short periods outside the body. ________（ 46It is the AIDS virus and it is a killer. AIDS is a disease caused by a virus that breaks down part of the body39。s immune system， leaving a person defenseless against a variety of unusual lifethreatening （ 47） The body39。s immune system normally provides us the weapons we need to win constant battles with invading viruses， bacteria and other invading anisms. His defense system is powerful but not perfect. ________（ 48） We do not even know that anything is happening. But the AIDS virus acts differently from other invaders. It attacks the very cells that normally protect us. ________（ 49） It turns our own white blood cells into minifactories or making more viruses. Each time a cell is taken over， it fills up with thousands of new viruses， dies and releases those viruses which attack more white blood cells. After enough attacks， our defense system is weakened and certain infections and conditions that we normally fight off with no problem take advantage of his weakness. ________（ 50） The person dies. There are no cure for AIDS， so learning about the disease and how to avoid it are our only weapons. it may be the most dangerous enemy in human history. 正保遠程教育 （美國紐交所上市公司 代碼 ： DL） _____________________________________________________________________ [16] 人事考試教育網 01082333888（ 24 小時） condition develops because of AIDS， the oute is always the same. gets inside these cells into minifactors or making more virus. of the letter in AIDS stands for a work： Acquired Immune Deficiency Syndrome. patients who suffer from AIDS have characteristic features. attacks are detected and beaten off with ease. 第 6 部分：完形填空（第 51～ 65 題，每題 1 分，共 15 分） 下面的短文有 15 處空白，請根據短文內容為每處空白確定一個最佳選項。 Seeing Red Means Danger Ahead The color red often means danger and by paying attention， 51 can be prevented. At railroad crossings， flashing red fights warn cars to stay back. A red light at a traffic intersection tells cars to stop， so 52 don39。t run into other cars. In the future， the color red also may help prevent danger 53 construction sites. Thanks to new work by engineers， bridge supports or other kinds of materials could one day contain a colorchanging material. It will turn red 54 a structure collapses or falls 55 . A tiny molecule may make a big difference in future warning systems. A polymer 56 a colorchanging molecule called a mechanophore turns red seconds before it snaps. The technology may one day allow damage to materials or structures to be easily 57 . The secret behind the colorchanging material is a particular type of molecule. A molecule is a group of atoms held together by 58 bonds. Molecules e in all shapes and sizes， and make up 59 you can see， touch or feel. How a molecule behaves depends on what kinds of atoms it contains， and how they39。re held together. When a polymer containing a colorchanging molecule called a mechanophore is about to breaks， it produces a color. When a polymer with mechanophore molecules bees “injured” or 60 ， one of the mechanophore bonds breaks and the material turns red. “It39。s a really simple detection method， ” says Nancy Sottos， one of the scientists who worked on the project. “We39。re 61 up this one bond， and it changes color.” Sottos and her team tested the colorchanging polymers in their lab. The test 62 proved encouraging. 正保遠程教育 （美國紐交所上市公司 代碼 ： DL） _____________________________________________________________________ [17] 人事考試教育網 01082333888（ 24 小時） There is a way to get rid of~ the red color： 63 . When a bright light is shone on the mechanophore， the broken bond is fixed——and the red color disappears. This “selfhealing” may be a problem for engineers. They need to use the colorchanger in big construction projects that will be 64 ， in sunlight. And sunlight will make the mechanophore39。s warning system useless. Sottos and her fellow scientists still have 65 work to do before the colorchanging molecules can be used outside the lab. 51. 52. 53. 54. 55. 56. 57. 58. 59. 60. 61. 62. 63. 64. 65. part of pair of piece of lot of 參考答案 DCDAC CACBD CABBD 正保遠程教育 （美國紐交所上市公司 代碼 ： DL） _____________________________________________________________________ [18] 人事考試教育網 01082333888（ 24 小時） ACCACAC BAFDAFBD DADCA DABCA DAADC ADFCB BACAD CBDAA BDCDD