【单选题】患儿, 2岁,曾多次患肺炎,活动后有气促但无青紫,胸骨左缘第3~4肋间闻及IV级收缩期杂音,肺动脉瓣区第二音亢进,最可能的诊断是
【简答题】计算题:某运输企业2015年年初拥有20辆整备质量为5吨的载货汽车,10辆整备质量为4吨的挂车,整备质量2.3吨的载货汽车8辆,中型载客汽车10辆,其中包括2辆电车。该企业所在地省级人民政府确定的载货汽车年税额每吨20元,载客汽车年税额每辆420元。计算该企业2015年应缴纳车船税。
【多选题】Which of the following costs of consignment are fixed? ( )
A.
costs of documentation
C.
costs of customs clearance
【单选题】If marginal costs equal average total costs,
A.
Average fixed costs are rising.
B.
Average total costs are falling.
C.
Average total costs are minimized.
D.
Average total costs are maximized.
【单选题】患儿,2岁,曾多次患肺炎,活动后有气促但无青紫,胸骨左缘第3~4肋间闻及IV级收缩期杂音,肺动脉瓣区第二音亢进,最可能的诊断是