单项选择题 使用GB2828对某产品批进行抽样检验，规定N=500，AQL=65，检查水平为II，可求得：一次正常检验方案为（）。

未知题型 螺旋弹簧的卷制有冷卷和热卷两种方法。

单项选择题 ● Extreme Programming (XP) is a discipline of software development with （71） of simplicity, communication, feedback and courage. Successful software development is a team effort – not just the development team, but the larger team consisting of customer, management and developers. XP is a simple process that brings these people together and helps them to succeed together. XP is aimed primarily at object-oriented projects using teams of a dozen or fewer programmers in one location. The principles of XP apply to any （72） project that needs to deliver quality software rapidly and flexibly. An XP project needs a （73） customer to provide guidance. Customers, programmers, managers, are all working （74） to build the system that’s needeD. Customers – those who have software that needs to be developed – will learn simple, effective ways to （75） what they need, to be sure that they are getting what they need, and to steer the project to success. （71）A.importanceB.keysC.rolesD.values （72）A.small-sizedB.moderately-sizedC. large-sizedD.huge-sized （73）A.part-timeB. casualC.seldomD.full-time （74）A.togetherB.by themselvesC.eparatelyD. alone （75）A.tellB.knowC. communicateD. feedback