Were you _____ at 4 o'clock yesterday? [ ]
A. work
B. works
C. working
D. worked
答案:C
在现金流量表的构成要素中,经营成本的计算公式是()。
A.经营成本=总成本费用-折旧费
B.经营成本=总成本费用-折旧费-摊销费
C.经营成本=总成本费用-折旧费-摊销费-利息支出
D.经营成本=总成本费用-折旧费-摊销费-利息支出-修理费
金属钠着火时,可采用的灭火物质是 [ ]
A.泡沫灭火器
B.水
C.煤油
D.沙子