A curve is a line______no part is straight and which has no angle.

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问题 A curve is a line______no part is straight and which has no angle.

选项 A、that
B、whose
C、in which
D、of which

答案D

解析 因为no part和which之间是从属关系,所以用of而不用in。of which引导一个定语从句。
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