Noise, in the technical sense, implies a random chaotic disturbance ______.

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问题 Noise, in the technical sense, implies a random chaotic disturbance ______.

选项 A、usually does not want
B、that one does not usually want it
C、usually is unwanted
D、that is usually unwanted

答案D

解析 that作关系代词,引导限制性定语从句,在从句中作主语或宾语,如:This is the poem that the critics speak so highly of.这就是那些批评家极为赞赏的那首诗。Anything that can burn is a source of heat,任何一种能够燃烧的东西都是一个热源。
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