Which of the following will occur if an operator types the command vi file.out?()
A. If the file exists it will be opened for editing. If the file does not exist an error message will be displayed.
B. If the file exists it will be opened for editing. If the file does not exist a new file with the name file.out will be created and opened for editing.
C. If the file exists an error message will be displayed. If the file does not exist a new file with the name file.out will be created and opened for editing.
D. If the file exists the operator will be asked whether to open the file or overwrite the file. If the file does not exist a new file with the name file.out will be created and opened for editing.
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2003年在抗击传染性非典型肺炎的工作中,产生了哪项法律()。
A. 《医疗废物管理条例》
B. 《国内交通检疫条例》
C. 《突发公共卫生事件应急条例》
D. 《中华人民共和国传染病防治法》
E. 《传染性非典型肺炎防治管理办法》
在组合逻辑的控制器中,节拍发生器〔TIMING〕的作用在于指明指令的执行(),它是一个典型的()逻辑电路,从一个节拍状态变到下一个节拍状态时,同时翻转的触发器数目以尽可能的()为好。
高、低速离合器不放气或放气慢的检查步骤及注意事项是什么?