The film used in photography is only a fraction of an inch thick, but is composed of many layers.

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问题 The film used in photography is only a fraction of an inch thick, but is composed of many layers.

选项 A、one-tenth
B、layer
C、bit
D、group

答案C

解析 名词辨析fraction小部分,片断,分数;fraction of:非常少量的;例:I got these shoes at a fraction of the original price.(这些鞋是我以原价中的非常少的钱买的,即:我以低于原价很多的价格买的这些鞋);而选项A.one tenth十分之一;B.layer层,阶层;C.bit少量,片刻;D.group群,批;因此C为答案。
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