乐音的音高是由______决定的。
A．响度
B．泛音频率
C．音色
D．基音频率
参考答案：D
解析：[分析] 本题考查计算机音乐信息处理基于声学研究的基本原理与相关知识。在声学中，将自然界的声音分为“乐音”和“噪音”两类，如果一个物体振动所发出的泛音(overtones) 频率为基音(fundamental tone)频率的整数倍，这个音就会具有清晰可辨的音高，称之为乐音，如钢琴、小提琴等发出的都是乐音；如果泛音频率无规律可言，即并非只有基音频率的整数倍频率的泛音，这个音就不具备清晰可辨的音高，称之为噪音。比如汽车发动机、计算机风扇等发出的都是噪音。我们感知到的乐音音高即为其基音的频率。
第五部分任务型阅读（共10小题；每小题1分，满分10分） 请认真阅读下面短文，并根据所读内容在文章后图表中的空格里填入最恰当的单词。注意：每空只能填1个单词。 A long story about people is usually called a novel. It can be about any kind of man, woman, or child. It can be about kings, or Chicago newsboys, or housewives. The French writer, Victor Hugo, wrote his novel Les Miserables about a poor man who stole a loaf of bread. The American writer, Ernest Hemingway, wrote A Farewell to Arms about a young American with the Italian Army in World War One. A novel can tell the story of any kind of action, over any period of time. The modern Irish writer, James, Joyce, covers less than twenty- four hours in Ulysses. Yet, Joyce takes a thousand pages to tell all that happens from the time one man gets up in the morning until he goes to bed early the next morning. A German writer, Herman Hesse, uses only one hundred and fifty pages in his novel Demian to cover a boy’s life from the age of ten until he becomes a young man. A novel does not just tell the things that people do. It also tells why they do them. The Badge of Courage, by the American novelist, Stephen Crane, tells about a young soldier in the War between the states who runs away the first time he is in battle. The book shows why he acted as he did. It describes his mental suffering until he overcomes his fears. People buy novels because they enjoy reading about other people. The novel satisfies the human desire to know and understand our fellow creatures. The 76._________ of the novel
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