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animation-duration属性用于定义整个动画效果完成所需要的时间。
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Andy's former boss always told her what to do and how to do it.
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Amusement industry means "娱乐产业”.
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Among the more than 1500 poems Emily Dickinson wrote, she sedom touched upon the subject of death.
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Among the following writers, Tomas Malory was one of the great trio.
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American university students have always liked to get degrees that are aimed at prepanring them specifically for certain professions.
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9．为了降低焊接残余应力和残余变形，尽可能采用对称焊缝，使其变形相反而相互抵消，并在保证安全可靠的前提下，避免焊缝厚度过大。（ ）
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9．土的构造是指整个土层（土体）构成上的不均匀性特征的总和。
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9．听觉传感器是将声源通过空气振动产生的声波转换成电信号的换能设备。
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9．天空中的所有物体都是天体。（ ）
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