从第一台计算机诞生到现在的50多年中计算机的发展经历了( )个阶段。
Goods are carried by several of transport--on road or rail, by sea or air.
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.
世界上第一台电子计算机诞生于德国。( )
从第一台计算机诞生到现在的50多年中计算机的发展经历了( )个阶段。
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