你能提出什么数学问题？和同桌说一说．你还会算吗？

从下面备选词组中选择恰当的项填入这段文字的空缺处。

她发觉众修女____而毫无声息地注视着她的举止，连忙____砰然作响的脚步。立定之后，她小心翼翼地____身旁的修女们，看到大家都以____的眼光看着她，便摇了摇头，____地走了。

备选词语：

a．无奈b．严厉c．严肃d．放慢e．窥视

洋葱的叶分为两种，管状叶伸向空中，能进行光合作用，鳞片叶层层包裹，富含营养，是常用的实验材料，下列有关叙述正确的是（　　）

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.