【单选题】After making some ______ opening remarks, she made an inspiring speech on environment protection.
【单选题】The margin of safety is:
A.
the excess of budgeted or actual sales over budgeted or actual variable expenses
B.
the excess of budgeted or actual sales over budgeted or actual fixed expenses.
C.
the excess of budgeted or actual sales over the break-even volume of sales.
D.
the excess of budgeted net operating income over actual net operating income.
【单选题】靠近湖边,新装修的客房是500元,进出方便,安静的客房是400元,你喜欢哪一种?此报价属于
【单选题】关于中断优先级,下面说法不正确的是()。
C.
任何一种中断一旦得到响应,不会再被其它的同级中断源所中断。
D.
自然优先级中INTO优先级最高,任何时候他都可以中断其他4个中断源正在执行的服务。
【多选题】(1)当曲线半径R350m时,曲线轨距加宽值应为 mm;曲线轨距应为 mm。