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你的選項應該是錯誤的,因為meager前對應的字是thick By Comparison(比較之下),所以前後文應該相反之意,meager應該翻成thin稀薄的或稀 少的 但答案中都沒有選項,你的答案應該有誤 (以上內容由美加 蔡睿老師提供) ※ 引述《Diablotin (咕嚕咕嚕)》之銘言: : Paragraph 5: The Jovian planets have very thick atmospheres consisting of : varying amounts of hydrogen, helium, methane, and ammonia. By comparison, : the terrestrial planets have [meager] atmospheres at best. A planet's ability : to retain an atmosphere depends on its temperature and mass. Simply stated, : a gas molecule can evaporate from a planet if it reaches a speed known as : the escape velocity. For Earth, this velocity is 11 kilometers per second. : Any material, including a rocket, must reach this speed before it can leave : Earth and go into space. The Jovian planets, because of their greater masses : and thus higher surface gravities, have higher escape velocities (21-60 : kilometers per second) than the terrestrial planets. Consequently, it is more : difficult for gases to "evaporate" from them. Also, because the molecular : motion of a gas depends on temperature, at the low temperatures of the Jovian : planets even the lightest gases are unlikely to acquire the speed needed to : escape. On the other hand, a comparatively warm body with a small surface : gravity, like Earth's moon, is unable to hold even the heaviest gas and thus : lacks an atmosphere. The slightly larger terrestrial planets Earth, Venus, : and Mars retain some heavy gases like carbon dioxide, but even their : atmospheres make up only an infinitesimally small portion of their total mass. : 5. The word [meager] in the passage is closest in meaning to : ○over time : ○long ago : ○simply : ○certainly : 答案是B 不懂怎麼選的耶...... : 又要請戰友們幫忙了 快考試啦~好緊張 -- ▅▅▅▅ ▅▅ ▅▅▅ ▅ ▅▅ ▅▅▅ █ █ █ █▅ █▄█ ▄ █ █▄█ █ █ █ █▄ █◥▅ █ █▅ █ █ 7/2(六)下午2:00美加文教新制GRE&字彙三合一免費講座 莫清崴博士/江璞教授 主講 歡迎蒞臨 http://www.merica.com.tw/event/20110702/ -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 114.36.53.186