印度推行了绿色革命之后，粮食供应状况逐步得到改善．由印度水稻和小麦的分布图，结合印度年降水量图，可知，印度的水稻大都分布在年降水量（ ）以上．

阿尔卑斯山脉阻碍了大西洋的湿润气流进入欧洲，所以温带海洋性气候只分布在欧洲西部狭长的地带。

如果a与－2互为相反数，那么a等于（    ）

阅读短文，下列问题

Computers are very important for the students now. For the city students, it's very easy to find a place to surf the Internet(网上冲浪). And for the village students, they can go to the Internet bar(网吧). Most of them spend more than two hours there, and some of them even spend more than eight hours there every day. They can do their homework, download(下载) some information for their homework, download music, send emails and play games.Most of them spend too much time playing games, so it's bad for their study.