試題詳解

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(A)It's a distance that is so minute that comparing it to anything in the regular world is a bit of a joke.
(B)Nanotechnology matters because familiar materials begin to develop odd properties when they're nanosize.
(C)Not all nanosize materials can change properties so usefully, but the fact that some do is a boon.
(D)Technological revolutions travel with the same stealth.