物流成本
闪点是指挥发可燃气与空气混合遇火源能（）温度。 ["A.燃烧正常 ","B.连续燃烧的必须 ","C.连续燃烧最低 ","D.燃烧最低"]
Your portable computer has two 512-MB memory modules installed in the only two memory slots available. You need to improve the speed of your computer. What should you do?（） ["A","B","C","D"]
政府机构运用现代计算机和网络技术，将其管理和服务职能转移到网络上去完成，我们称之为（）。 ["电子商务","电子管理","电子政府","电子政务"]
物流质量管理
什么是电流互感器的极性？
