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[听力原文]11-15Venice is a fascinating city between sea and sky. It is built on 117 islands. There aren’t any cars and buses, But it has 150 canals and 400 bridges. The narrow streets, with their historic names, are paved with stones but have no footpaths. They are lined with flower, shops and lights side by side. The squares are charming, The brick bridges are built high to; allow boats to pass tinder them.Every year thousands of tourists front the five continents visit this city. They are always amazed at the charm of her water and beautiful lights, which can make them free from all dust and cooled by the sea breezes.But because the level of the surrounding waters is constantly rising, the Venice faces a threat to its Very existence. And the Venetian love their city and want to stay there to save the Venice from the sea, Now various methods hove already been taken and a plan to protect the city is under investigation. Every year where do thousands of tourists come from to visit this city？They come from（）

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[听力原文]11-15Venice is a fascinating city between sea and sky. It is built on 117 islands. There aren’t any cars and buses, But it has 150 canals and 400 bridges. The narrow streets, with their historic names, are paved with stones but have no footpaths. They are lined with flower, shops and lights side by side. The squares are charming, The brick bridges are built high to; allow boats to pass tinder them.Every year thousands of tourists front the five continents visit this city. They are always amazed at the charm of her water and beautiful lights, which can make them free from all dust and cooled by the sea breezes.But because the level of the surrounding waters is constantly rising, the Venice faces a threat to its Very existence. And the Venetian love their city and want to stay there to save the Venice from the sea, Now various methods hove already been taken and a plan to protect the city is under investigation. How many islands are there in Venice？It is（）

设窗体上有一个名称为Combo1的组合框，并有以下程序： Private Sub ComboLKeyPress(KeyAscii As Integer) If (7) =13 Then 回车符的ASCⅡ码是13 For k=0 To (8) -1 If Combo1.Text=Combo1.List(k)Then Combo1.Text=" " Exit For End If Next k If Combo1.Text＜＞" "Then Combo1.AddItem (9) End If End If End Sub 程序的功能是：在组合框的编辑区中输入文本后按回车键，则检查列表中有无与此文本相同的项目，若有，则把编辑区中的文本删除，否则把编辑区中的文本添加到列表的尾部。请填空。

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