关于工程网络计划中虚工作的说法,错误的是()。 ["虚工作表示工作之间的逻辑关系","虚工作的总时差和自由时差均为零","虚工作的持续时间为0","在双代号网络计划中存在虚工作"]
短期总供给曲线表明() ["总需求与价格水平同方向变动","总需求与价格水平反方向变动","总供给与价格水平同方向变动","总供给与价格水平反方向变动"]
进行侦查实验应遵循的基本规则有哪些?
Which of the following fragments might cause errors?() [" String s = "Gone with the wind";String t = " good ";String k = s + t;"," String s = "Gone with the wind";String t;t = s[3] + "one";"," String s = "Gone with the wind";String standard = s.toUpperCase();"," String s = "home directory";String t = s - "directory";"]
在使交流电转换为直流电源过程中,二极管滤除了交流电的脉动成分。
影响城市土地价格的一般因素是指对整个社会和地区的地价水平具有()影响的宏观因素。