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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】As high school students flock to social networking sites, campus police are scanning their Facebook and MySpace pages for tips to help break up fights, monitor gangs and prevent crime. Some students o...
A.
students’ casual attitude to private information
B.
the technical support offered by the websites
C.
the approval given by the students themselves
D.
the special right granted by the government
【单选题】关于田纳西河流域自然地理特征的叙述正确的是
A.
流域内地形起伏小，水力资源不丰富
B.
流域内属于亚热带湿润气候，降水集中在夏秋季节
C.
田纳西河是密西西比河的一级支流，水量丰富但不稳定
D.
流域内矿产资源丰富，主要有煤、铁、铜等