小肠是人体消化系统的重要器官．下列叙述错误的是（  ）

选词填空。

    Vienna，both the capital city of Austria and the centre of____classical music．is a beautiful old city on the River Danube．In the eighteenth century,lots of____came to study and work there．Among them，three composers____Johann Strauss(the father and the son)and Mozart were very famous．Mozart could play the piano and the violin before six．His family____him around Europe to give concerts and he wrote____of pieces of music．

“早穿皮袄午穿纱，围着火炉吃西瓜．”这句谚语反映了我国新疆的某些地区夏季昼夜气温变化显著．沿海地区不像内陆地区昼夜气温变化那么大，其主要原因是砂石比水具有较小的     (    )

下列说法正确的是（   ）