题目

Horror seized the heart of the World War I soldier as he saw his life-long friend fall in the battle. Caught in a trench(战壕)with continuous gunfire whizzing over his head, the soldier asked his commander if he might go out into the “No Man’s Land” between the trenches to bring his fallen comrade back. “You can go,” said the commander, “but I don’t think it will be worth it. Your friend is probably dead and you may throw your own life away.” The commander’s words didn’t matter, and the soldier went anyway. To one’s surprise, he managed to reach his friend, ra（2011年江西，19题）化学小实验是我们进一步认识物质及其变化的重要方式。（1）图1中将10mL的红墨水与10mL酒精混合，所得体积小于20mL，其微观原因：    ；（2）图2生成炭黑的实验说明石蜡中一定含有      元素；（3）图3中1、3孔的现象是     ，该实验的目的是探究         。