【单选题】飞机电器中采用气体吹弧的原理是利用灭弧材料受热后产生大量气体来一)吹向电弧而加强去游离过程;二)增大燃弧区域的气压而阻止游离的过程;三)增加触点回路的电阻而满足熄弧条件。上述三种结论中
【单选题】行政单位会计 预算要素 的平衡等式是 ( )。
【多选题】观察问题时,设计师需要认真观察 表层现象 和 数据, 结合()、()和()去分析 它们 。
【判断题】静息电位的产生不消耗能量而维持则需要钠泵的正常运转。
【单选题】Actual results might differ from the master budget because:
A.
sales and other cost-driver activities were not the same as originally forecasted
B.
revenues or variable costs per unit of activity were not as expected
C.
fixed costs per period were not as expected
D.
All of these answers are correct.