代收代缴，是指按照税法规定，负有扣缴税款义务的法定义务人，在向纳税人支付款项时，从所支付的款项中直接扣收税款的方式。
参考答案：错
一个容积为10L的氧气瓶内装有密度为1.5kg/m3的氧气，用去一半氧气后，瓶内剩下的气体质量为______kg，密度为______ kg/m3．
When cutting wire rope，seizings are put on each side of the cut.The seizings prevent the wire from unlaying and also（）.
A.Maintain the original balance of the tension in the wires and strands
B.Prevent moisture from entering between the wires at the cut end
C.Forces lubricant from the core to protect the raw，cut end
D.All of the above
