既可减少工件表面粗糙度数值又能提高工件尺寸和形状精度的方法有（）。A研磨 B珩磨 C超级光磨 D抛光 E平面磨

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高等继续教育 / 机械制造基础

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既可减少工件表面粗糙度数值又能提高工件尺寸和形状精度的方法有（）。A研磨 B珩磨 C超级光磨 D抛光 E平面磨
A.抛光
B.平面磨
C.超级光磨
D.研磨
E.珩磨

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机械制造基础

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外螺纹M24×2-6g，公称中径为d2=22.701mm，Td2=170μm，g的基本偏差es=-38μm，测得其实际中径d2实际=22.510mm，螺距累计误差ΔPΣ=-0.040mm，牙型半角偏差试判断该螺纹中径的合格性。精度设计与质量控制基础

题干二、阅读理解：正误判断（每题10分） The law defines youthful offenders (age 18 or under) as “delinquent” if they commit offenses. As for the same offenses, the court would consider an adult as a “criminal”. “Status offenders” are juveniles who commit offenses appropriate only to juveniles, such as truancy from school. Here are a few ideas to help prevent your children from being a delinquent. Keep your children in school to help prevent delinquency. Minor offenses, such as truancy, can lead to more serious offenses. Make clear to your children your expectations about their school attendance. Meet with school officials if necessary. Exercise adequate supervision. Juveniles rarely commit serious offenses while under the supervision of an adult. Seek the assistance of your local service agencies if you feel you cannot control your children. Attend parenting classes, or join a local support group if you are having trouble understanding how to exercise discipline. Educate your children about the dangers of drugs. Drug offenses and addiction can have serious consequences for your children. Let your children know you will not tolerate drug use. Stay informed about drug use trends in children. Get your children involved in after-school recreational activities, sports, community service or other positive activities. Young people with positive outlets for their energy are more likely to do well in school and avoid the problems of delinquency. Know who your children's friends are. Show an interest in your children's social life and peer groups. Peer pressure may have a bad effect on teenagers and young people. Do not allow your children to associate with juvenile delinquents. 操作提示：句子正确选择下拉选项框为“T”；句子错误选择下拉选项框为“F”。 The court would consider youthful offenders as “criminals” if they commit offenses. 回答TF未回答正确答案是：F获得10.00分中的0.00分 You must meet with school officials to prevent your children from delinquency. 回答TF未回答正确答案是：F获得10.00分中的0.00分 If you cannot control your children, ask for help from the local service agencies. 回答TF未回答正确答案是：T获得10.00分中的0.00分 Inform your children that you will not tolerate drug use and drug offenses can have serious results for your children. 回答TF未回答正确答案是：T获得10.00分中的0.00分 Children always involving in positive activities are more likely to do well in school and avoid the problems of delinquency. 回答TF未回答正确答案是：T获得10.00分中的0.00分反馈解析： 1. 这是一道细节题。第一段的第一句说的是法律将年轻的罪犯(18岁或以下)定义为“流氓”,如果他们犯下罪行的话。句子中所定义的为“流氓”，而不是“罪犯”(criminal)，与题目意思相反，所以是F。 2. 这是一道细节题。第二段的第一句意为“让孩子呆在学校里，有助于预防犯罪”，与题目意思相反，所以是F。 3. 这是一道细节题。第三段提到Seek the assistance of your local service agencies if you feel you cannot control your children意思是“如果你觉得你控制不住你的孩子，向当地的服务机构寻求帮助”，与题目意思一样，所以是T。 4. 这是一道细节题。第四段中Drug offenses and addiction can have serious consequences for your children. Let your children know you will not tolerate drug use.意思是“毒品犯罪和成瘾会对孩子造成严重的后果。让你的孩子知道你不会容忍吸毒”，与题目意思一样，所以是T。 5. 这是一道细节题，第五段中的Young people with positive outlets for their energy are more likely to do well in school and avoid the problems of delinquency意思是“对于自己的精力能够通过积极途径释放的年轻人通常在学校的表现良好，还可以避免与积极的媒体为他们的能源更有可能在学校表现良好,避免不良问题的出现。”，与题目意思刚好一致，所以是T。人文英语3

简述我国夫妻约定财产制。婚姻家庭法学

17.\t当一个主机知道它的IP地址但不知道它的物理地址时，它需要使用（）。网络技术基础

通过固定样本调查可以了解更多的信息，如：市场调研与预测

1．宇宙中最主要天体类型是和。 2．板块构造说的理论是在学说、学说的基础上发展起的。 3．世界上第一个微处理器是，诞生于年。 4．世界上第一个提出集成电路思想的人是。科学与技术