【简答题】A.undertaking B.guarantee C.insurance D.obligation
【简答题】aceessary obligation
【简答题】A moral obligation bond is also known as: A. a general obligation debt. B. a prerefunded bond. C. an appropriation-backed obligation.
【简答题】A.work B.duty C.task D.obligation
【多选题】在食品灰分测定中,对样品进行炭化的目的是 ( )
A.
防止在灼烧时 , 因温度高试样中的水分急剧蒸发使试样飞扬
B.
防止糖、蛋白质、淀粉等易发泡膨胀的物质在高温下发泡膨胀而溢出坩埚