因特网和核心部分由大量网络和连接这些网络的________组成。
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.
Interner又称“因特网”,是由不同的计算机网络连接在一起形成的( )。
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