A:大于0.9 mol
B:等于0.45 mol
C:小于0.45mol
D:大于0.45 mol小于0.9 mol
Generally speaking, there _______ be any survivors(幸存者) after such a long time. However, two young people were found _______. Life is super-nature!
美国内战、俄国农奴制改革和日本明治维新所共同承担的最重要的、最根本的历史使命是( )