第13题: [单项选择]The newly built sports ground has a ______ of 50,000 people. A. capability B. capacity C. advantage D. seat 参考答案:B 答案解析:[题解] 单词capacity:容量;能力;生产力;才能;资格。单词capability:能力;性能;约束力。单词advantage:优点;便利;好处;优势。单词seat:座位;席位;所在地;位子。如
A. problems of waste disposal B. dangers of drinking from wells C. turbidity of polluted water D. outbreak of cholera 参考答案:A 答案解析:此题为主旨题。线索词为“sewage”、“pollutant”、“sewage disposal”等,这些词贯穿文章始终,可见A项符合题意。B、C、D三项皆为文中细节,不能反映主题。