【正文】 　　96. I find young people exciting. They have an air of freedom, and they have not a dreary mitment to mean ambitions or love fort. They are not anxious social climbers, and they have no devotion to material things.。　　85. The sloth pays such little attention to its personal hygiene that green algae grow on its coarse hair and munities of a parasitic moth live in the depths of its coat producing caterpillars which graze on its mouldy hair. Its muscles are such that it is quits incapable of moving at a speed of over a kilometer an hour even over the shortest distances and the swiftest movement it can make is a sweep of its hooked arm.，以至于它粗糙的毛發(fā)上生出綠苔，成群的寄生蛾生長在它的皮毛深處，變成毛毛蟲，并以它的臟毛為食?！　?2. Often very annoying weeds, goldenrods crowd out less hardy plants and act as hosts to many insect pests.，它擠走不那么頑強的植物，并找來很多害蟲?！　?6. Perfectly matched pearls, strung into a necklace, bring a far higher price than the same pearls told individually.，串成一條項鏈，就能賣到比單獨售出好得多的價錢?！　?0. Studies of the gravity field of the Earth indicate that its crust and mantle yield when unusual weight is placed on them.，在不尋常的負荷之下地殼和地幔會發(fā)生位移。　　25. The mechanism by which brain cells store memories is not clearly understood.?！　?. The difference between libel and slander is that libel is printed while slander is spoken.，而后者是口頭的?！　?0. The knee is the joints where the thigh bone meets the large bone of the lower leg.?！　?6. By the middle of the twentieth century, painters and sculptors in the United States had begun to exert a great worldwide influence over art.，美國畫家和雕塑家開始在世界范圍內對藝術產(chǎn)生重大影響?！　?1. The annual worth of Utah’s manufacturing is greater than that of its mining and farming bined.?！　?7. During the eighteenth century, Little Turtle was chief of the Miami tribe whose territory became what is now Indiana and Ohio.，“小烏龜”是邁阿密部落的酋長，該部落的地盤就是今天的印第安那州和俄亥俄州。　　73. Starting around 7000 ., and for the next four thousand years, much of the Northern Hemisphere experienced temperatures warmer than at present.，在四千年當中，北半球的溫度比現(xiàn)在高。她的肌肉不能讓他哪怕在很短的距離以內以每小時一公里的速度移動。它們帶有自由的氣息，他們不會為狹隘的野心和貪婪享受而孜孜以求。這也許就是困難之所在。他的高級作文課上的學生覺得他在課上古板得可怕，但私下交流卻富有同情和理解?！　?1. People in prehistoric times created paints by grinding materials such as plants and clay into power and then adding water.，然后加水?！　?5. The history of painting is a fascinating chain of events that probably began with the very first pictures ever made.，其源頭大概可以上溯到最早的圖畫。　　39. The continental divide refers to an imaginary line in the North American Rockies that divides the waters flowing into the Atlantic Ocean from those flowing into the Pacific.，該線把大西洋流域和太平洋流域區(qū)分開來?！　?4. Most substance contract when they freeze so that the density of a substance’s solid is higher than the density of its liquid.，所以他們的密度在固態(tài)時高于液態(tài)?！　?. With modern offices being more mechanized, designers are attempting to personalize them with warmer, less severe interiors.，設計師們正試圖利用較為溫暖而不太嚴肅的內部裝飾來使其具有親切感?！　?1. Acids are chemical pounds that, in water solution, have a sharp taste, a corrosive action on metals, and the ability to turn certain blue vegetable dyes red.，它在溶于水時具有強烈的氣味和對金屬的腐蝕性，并且能夠使某些藍色植物染料變紅?！　?7. In the eastern part of New Jersey lies the city of Elizabeth, a major shipping and manufacturing center.，一個重要的航運和制造業(yè)中心，坐落于新澤西州的東部?！　?2. The wallflower is so called because its weak stems often grow on walls and along stony cliffs for support.，是因為其脆弱的枝干經(jīng)常要靠墻壁或順石崖生長，以便有所依附。　　58. Among almost seven hundred species of bamboo, some are fully grown at less than a foot high, while others can grow three feet in twentyfour hours.，有的全長成還不到一英尺，有的卻能在二十四小時內長出三英尺?！　?4. When Henry Ford first sought financial backing for making cars, t