发现有人触电，周围又没有电闸，你应该(    )。  

大于-2.5而小于π的整数共有(     )

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    Chinese writer Mo Yan won the 2012 Nobel Prize in Literature(诺贝尔文学奖)．He is the first Chinese to win the prize．
    Mo Yan was born into a farmer's family in Shandong in 1955．He left school to work at the age of twelve，first on the farm，later in a factory．In 1 976 he joined the PLA and during this time he began to study writing．His first short story was published(出版)in 1981．He has written many famous books about his childhood and his home town．Many of his books were translated into English，French and many other languages．
    Mo Yan's winning of the Nobel Prize in Literature，widely regarded as(被认为)a great encouragement for China's literature，is bringing more confidence to the nation's young authors．
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阿里斯泰德指挥过著名的马拉松战役，且在抗击波斯侵略的战争中立有赫赫战功。马拉松战役之后，他利用职权，企图在雅典建立一个由少数贵族掌权的政府。于是，在一次公民大会上，雅典公民便以阿里斯泰德操纵国政为由，用陶片放逐法将他放逐了。这表明（    ）

如图所示，平行导轨间距为d，一端跨接一个电阻R，匀强磁场的磁感应强度为B，方向垂直于平行金属导轨所在平面．一根金属棒与导轨成θ角放置，金属棒与导轨的电阻均不计．当金属棒沿垂直于棒的方向以恒定的速度v在金属导轨上滑行时，通过电阻R的电流是                                                                (　　)