题目

Ludwig van Beethoven,one of the world's greatest musicians,was born into a musical family in Germany.As a child he spent many lonely hours___36___(practise) his music every day.In his late teens he went to Vienna for further study.There he became well___37___(know) by people. One evening as he was out walking,he passed an old house___38___he heard someone inside playing one of his compositions.As he stopped___39___(listen),he overheard a girl say that she___40___(wish) she could hear a real musician play it properly. Beethoven went___41___the house and,noticing the young lady at the p8．人体各个系统看似独立，实际上是密切相关的，如图为人体呼吸系统、消化系统、循环系统和泌尿系统的生理活动示意图，请据图回答下列问题：（1）图中1和2比较，1中的二氧化碳气体比2的含量较多．（2）孙悟到医院进行血常规检查，测得血红蛋白含量为90克/升（正常值范围是110克/升～150克/升），医生建议他应该注意多吃含蛋白质和含铁质丰富的食物．消化和吸收食物中营养物质的主要器官是小肠，孙悟补充的蛋白质在胃内被初步消化，人体参与消化蛋白质的消化液有胃液、肠液和胰液．（3）细胞是生命活动的基本单位，生命活动所需的能量是细胞中线粒体的呼吸作用释放出来的，请根据图文字和字母，完成下面的填空．氧气→呼吸道→肺泡→肺部毛细血管→A左心房→B左心室→组织细胞周围的毛细血管→细胞葡萄糖→口→咽→食道→胃→小肠→下腔静脉→C右心房→D右心室→肺部毛细血管→A左心房→B左心室→组织细胞周围的毛细血管→细胞．