The microscope opened up to man another strange new world: a world of things too near and small for anyone () the scientist to know much about or do much about.
A. besides
B. apart from
C. but
D. without
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Speaker A: Can you come to my office early to help me with my paper Speaker B: ().
A. Thank you for your invitation. I’m sure to be there.
B. I’d like to, but I can’t leave until I’ve typed out the letters.
C. By all means. I have to finish my own paper first.
D. What do you expect me to do for you
典型的交换式局域网为交换式以太网,其核心部件为 【6】 。
如果路由表中没有包括到某一特定网络或特定主机的路由,路由选择例程就可以将数据报发送到 【13】 上。
进程在运行过程中有3种基本状态,分别是运行状态、就绪状态和 【9】 。