与广域网相比,局域网__
You can _____ some bottles of wine, or some chocolates, or a bunch of flowers.
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
根据计算机网络覆盖地理范围的大小, 网络可分为局域网、城域网和______.
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