試題詳解

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(A)Nanotechnology matters because familiar materials begin to develop odd properties when they're nanosize.
(B)Nanotechnology has been around for two decades, but the first wave of applications is only now beginning to break.
(C)Not all nanosize materials change properties so usefully, but the fact that some do is a boon.
(D)Technological revolutions travel with the same stealth.