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【单选题】
Which of the following best describes a controllable cost?A.
A cost which can be easily forecast and is therefore readily controllable using budgetary control technique.
B.
A cost which can be separately identified with a particular cost object
C.
A cost which is easily controlled because it is not affected by fluctuations in the level of activity
D.
A cost which can be influenced by its budget holder.
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举一反三
【简答题】Three broad categories of traders can be identified: , , 。
【单选题】当缀条采用单角钢时，按轴心受压构件验算格构柱的承载能力，必须将设计强度按照规定乘以折减系数，原因是（ ）。
A.
格构式柱所给的剪力是近似值
B.
缀条很重要，应提高其安全系数
C.
考虑缀条受到的压力有偏心作用
D.
缀条破坏将引起绕虚轴的整体失稳。
【简答题】设三阶矩阵 ，试求矩阵A的秩．
【多选题】The three broad categories of hip pop dance are
A.
breaking
B.
tapping
C.
locking
D.
popping
【简答题】要关闭已打开的数据库连接,应使用连接对象的( )方法。