【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 techniques
B.
A cost which can be specifically identified with a particular cost object
C.
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
【单选题】标准状况下,若两种气体所占的体积不同,其原因是( )
【判断题】 井口高程基点的测量应按三等水准测量的精度要求测设。
【判断题】在中国语言由白话取代文言的关键时期,胡适既是一位语言革命家,又是一位杰出的建设者。()
【单选题】The ideal controllable switch has the following characteristics. Which is wrong? ( )
A.
Block arbitrarily large forward and reverse voltages with zero current flow when off.
B.
S witch from on to off or vice versa long-termly when triggered.
C.
C onduct arbitrarily large currents with zero voltage drop when on.
D.
V anishingly small power required from control source to trigger the switch.
【单选题】The alternating current generator supplying a load has a voltage drop resulted from the loadWhen the load has a lagging power factor this voltage drop ().
【判断题】轻钢龙骨连接件有主副龙骨连接件、加长件、主吊件、副龙骨连接件
【单选题】As shown in following figure, a typical garden-variety red LED device will exhibit a drop of about 1.7 volts across its terminals. Note that this is not the same as the voltage drop across a resistor,...