问题 选择题

如图所示是用比例模型来表示物质间发生化学反应的微观示意图。图中分别表示两种元素的原子,一定条件下发生的下列反应能用题图表示的是 

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A.2H+ O2=2H2O          

B.2CO+O2=2CO2    

C.N2+ O2=2NO             

D.N2+3H2=2NH3 

答案

答案:C

问答题

       1937年——1945年,中国人民经过八年的抗战取得胜利。根据抗日战争相关史实回答:

(1)全国性抗日战争开始的标志是什么? 

                                                                                                                                                             

(2)抗战以来,国民党正面战场在哪次战役中取得了重大胜利?这次战役的指挥者是谁?

                                                                                                                                                             

(3)抗战开始后,八路军在华北地区进行的以破坏敌人交通线为主要目标的战役是什么?这次战役的指挥者是谁?

                                                                                                                                                             

(4)抗日战争取得胜利的决定性力量是什么?抗日战争的胜利对今天中国的发展有何启示?

                                                                                                                                                             

                                                                                                                                                             

单项选择题