According to a recent survey,violence did exist in schools. Students ____ (show) their fear and parents and teachers also expressed their great concern about it. ____ (expert) hope the whole society will pay more attention to the mental health of adolescents.

    Nowadays, school violence is ____ hot issue. I think this is a phenomenon（现象）, ____ calls for our great concern.We should try every effort ____ (prevent) violence happening at school for more and more students would drop out of school if their personal ____ (safe) could not be guaranteed.In fact,violence can be learned.Children learn violent behavior from adults or from ____ they see on television or on the Internet.

    If I meet with school violence,I will not answer violence ____ violence, for it will result in ____ (much、fighting.I will tell my teachers or parents about it.I think they will help me deal with it well and they will protect me from the bad guys.

    All in all, every student should behave ____ (he) and keep away from violence.

根据课文《草原》内容填空。

课文中体现蒙古族民族风情的地方有三处：

①蒙古族人民穿着各色民族服装，到几十里外____

②他们用____招待客人。

③饭后，____

地处干旱区的宁夏银川市，其周边地区曾广布湖泊，明清时有“七十二连湖”的说法。20世纪80年代银川周边湖泊所剩无几。1999年开始，银川实施恢复湿地的计划。下图示意银川周围目前的湖泊分布。据此完成下面小题。

结扎是指使用一定的手段（如使用羊肠线）将人体或生物体的某些管道（如血管、输精管、输卵管等）扎住或起到同样的效果，下列关于结扎的叙述中，不正确的是（　  　）