一、填充题(本题共24分) 1、我国在探索生命起源问题上的两项重大成就:1965年首次用化学方法人工合成了具有生物活性的_____________;1981年又用化学方法人工合成了__________________________。2、外界气体与肺泡内的气体交换是通过___________________实现的。组织细胞产生的CO_2通过_______________进入血液。O_2在血液中是以________________的形 First, the filling questions (a total of 24 points) 1, China’s exploration of the origin of life on the two major achievements: the first time in 1965 by chemical synthesis of biologically active _ _ _ _ _ _ _ _ _ _ _ _; 1981 Chemical synthesis of __________________________. 2, outside gas and alveolar gas exchange is achieved through ___________________. C02 produced by tissue cells enters the bloodstream through _______________. O_2 in the blood is ________________ shape