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單項(xiàng)選擇題

用來測(cè)定氨氮的方法是（）。

A、靛酚藍(lán)比色法
B、酚二磺酸分光光度法
C、萘基乙二胺分光光度法　
D、納氏試劑比色法

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在日常維修中，下列哪些情況下不能直接做輪胎動(dòng)平衡（）

A.輪胎有嚴(yán)重偏磨
B．防爆輪胎
C．輪轂有變形
D．輪胎里注入了輪胎膠
E．修補(bǔ)過的輪胎

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Furniture pieces are designed and fabricated to assist in the many ways people sit and rest, work and play, organize or display items, and partition space. This view suggests broad utilitarian framework, in which _________ is perceived to bathe primary intended purpose of furniture.
A、beauty
B、function
C、fabrication technologies
D、principles of design

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