①显示出我国是推动建立国际新秩序的主力军

②表明国际援助是解决人道主义危机的根本之道

③体现了我国在国际事务中发挥着建设性作用

④表明我国积极承担与国际地位相适应的责任

若单项式2x^my与-$\frac{1}{2}{x}^{2}y$是同类项，则m=____ 

阅读下面的诗文，回答相关问题。

                                                                                                          《饮酒》
                                                                                                            陶渊明

                                                                                             结庐在人境，而无车马喧。
                                                                                             问君何能尔，心远地自偏。
                                                                                             采菊东篱下，悠然见南山。
                                                                                             山气日夕佳，飞鸟相与还。
                                                                                              此中有真意，欲辩已忘言。