下列各组软件中,全部属于应用软件的是________。
计算机软件分为系统软件和应用软件两大类,下列各项中属于系统软件的是______。
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.
计算机软件分为系统软件和应用软件两大类,下列各项中属于系统软件的是______。
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