人教版高中数学必修三测试题.docx

1 选择题1. 下列说法不正确的是（ ）A. 系统抽样是先将差异明显的总体分成几个小组，在进行抽取B. 分层抽样是将差异明显的几部分组成的总体分成几成，然后进行抽取C. 简单随机抽样是从个体无差异且个数较少的总体中逐个抽取个体D. 系统抽样是从个体无差异且个数较多的总体中，将总体均分，再按事先确定的规则在各部分抽取。2. 某班的60名学生已经编号1，2，3，.，60，为了解该班同学的作业状况，老师收取了号码能被5整除的12名同学的作业本，这里运用的抽样方法是（ ）A. 简单随机抽样B. 系统抽样C. 分层抽样D. 抽签法3. 统计某校1000名学生的测试成绩，得到的样本频率分布直方图如图所示，若满分为100分，规定不低于60分为及格，则及格率是（ ）A.20% B.25% C.6% D.80%如果你是质检员，在收集到上述数据后，机床（ ）生产的零件质量更符合要求。3 解答题16题第一问不用写 technical department, quality Department, laboratory, measurement and construction team nt implementation of the quality first, prevention first, a self check and cross-check, check, so that anyone who was responsible for the construction. 14.2.5 material procurement and management 1, purchase plans according to the construction plan requirements. QC Department to participate in acceptance of materials, negative and seal the incorrect material. 2, according to tender documents and standards for test and evaluation of raw materials, qualified materials classified and piled up and set up a sign detailing acceptance of varieties, quantities, date and signature of management. 14.2.6 nonconforming product control and management of nonconforming products should be controlled on the spot, by construction workers, technicians and QC field fill out the unqualified report, nonconforming should withdraw from the scene and striking identity to avoid misuse. Face treated by supervision engineers permission to continue construction. 14.2.7 check site laboratory quality supervision and inspection and test management program led by the QC, the test methods, procedures, and strictly according to