【单选题】【消耗次数：1】
声音三要素中代表声音高低的是_______
①
音调
②
音色
③
音强
④
响度
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【简答题】
声音的三要素是音调、[填空1]和音色。
【简答题】
什么是声音？声音的三要素是什么？
随机题目
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a certain amount of
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a great deal of
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a great number of
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a large number of
【多选题】
The population there has_____________ by ten percent.
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increased
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【单选题】
She never married and she never went to school____________ .
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either
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also
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too
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neither
【单选题】
Mary Kingsley believed that Africans could learn technology____________ and would finally move into the modern world.
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gladly
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carefully
③
possibly
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gradually
【单选题】
It was in the United States, after 1900,____________ the automobile was improved most rapidly.
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that
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what
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when
【单选题】
Alexander Graham Bell ____________ the telephone in 1876.
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found
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discovered
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【判断题】
合同进入方式是一个国际化经营的企业与目标国家的法人之间在转让技术、工艺等方面订立的长期 的、自始至终的、非投资性的合作合同。与投资进入方式的区别是，它不对目标国家投资。
①
正确
②
错误