解释下列词语或句子中划线字的意思。

1．死得其所                   语重心长                        

     铺天盖地                   掩耳盗铃                      

2．人固有一死                        或重予泰山                     

     或轻于鸿毛                        

3．思援弓缴而射之                                                        

     孰为汝多知乎