1. The chanterelle, a type of wild mushroom, grows beneath host trees such as the Douglas fir, which provide it with necessary sugars. The underground filaments of chanterelles, which extract the sugars, in turn provide nutrients and water for their hosts. Because of this mutually beneficial relationship, harvesting the chanterelles growing beneath a Douglas fir seriously endangers the tree. Which of the following, if true, casts the most doubt on the conclusion drawn above? (A) The number of wild mushrooms harvested has increased in recent years. (B) Chanterelles grow not only beneath Douglas firs but also beneath other host trees. (C) Many types of wild mushrooms are found only in forests and cannot easily be grown elsewhere. (D) The harvesting of wild mushrooms stimulates future growth of those mushrooms.（D） (E) Young Douglas fir seedlings die without the nutrients and water provided by chanterelle filaments. 给出的答案是d，想不太明白，野蘑菇的茂盛激发了他们进一步的成长，这不是加强了原文的对树有威胁的结论么． e中说这种．．树没有cf的营养回死去，这不就反对了了原文的结论吗，这个好象更好些！！ 5. Archaeologists have found wheeled ceramic toys made by the Toltec, twelfth-century inhabitants of what is now Veracruz. Although there is no archaeological evidence that the Toltec used wheels for anything but toys, some anthropologists hypothesize that wheeled utility vehicles were used to carry materials needed for the monumental structures the Toltec produced. Which of the following, if true, would most help the anthropologists explain the lack of evidence noted above? (A) The Toltec sometimes incorporated into their toys representations of utensils or other devices that served some practical purpose. (B) Any wheeled utility vehicles used by the Toltec could have been made entirely of wood, and unlike ceramic, wood decays rapidly in the humid climate of Veracruz. (C) Carvings in monument walls suggest that the Toltec’s wheeled ceramic toys sometimes had ritual uses in addition to being used by both children and adults as decorations and playthings. (D) Wheeled utility vehicles were used during the twelfth century in many areas of the world, but during this time wheeled toys were not very common in areas outside Veracruz.（B） (E) Some of the wheeled ceramic toys were found near the remains of monumental structures. 我觉得答案b有问题，这个工具的制造成分似乎和本题不相关，e答案似乎更好些．．迷惑中 14. In order to increase revenues, an airport plans to change the parking fees it charges at its hourly parking lots. Rather than charging $2.00 for the first two-hour period, or part thereof, and $1.00 for each hour thereafter, the airport will charge $4.00 for the first four-hour period, or part thereof, and $1.00 for each hour thereafter. Which of the following is a consideration that, if true, suggests that the plan will be successful in increasing revenues? (A) Very few people who park their cars at the hourly parking lot at the airport leave their cars for more than two hours at a time. (B) Over the past several years, the cost to the airport of operating its hourly parking facilities has been greater than the revenues it has received from them. (C) People who leave their cars at the airport while on a trip generally park their cars in lots that charge by the day rather than by the hour. (D) A significant portion of the money spent to operate the airport parking lot is spent to maintain the facilities rather than to pay the salaries of the personnel who collect the parking fees.（A） (E) The hourly parking lots at the airport have recently been expanded and are therefore rarely filled to capacity. 答案a，e似乎也可以 5. In the course of her researches, a historian recently found two documents mentioning the same person, Erich Schnitzler. One, dated May 3, 1739, is a record of Schnitzler’s arrest for peddling without a license. The second, undated, is a statement by Schnitzler asserting that he has been peddling off and on for 20 years. The facts above best support which of the following conclusions? (A) Schnitzler started peddling around 1719. (B) Schnitzler was arrested repeatedly for peddling. (C) The undated document was written before 1765. (D) The arrest record was written after the undated document.（C） (E) The arrest record provides better evidence that Schnitzler peddled than does the undated document. 红色的地方不知道怎么确切的翻译，请指教！ 不好意思帖子有点长！！！望请各路大侠赐教！！ | 
