钻不通孔时应按孔深尺寸调整好(),避免钻深误差,并注意及时排屑。
A.钻床进给挡块或深度标尺
B.工作台高度
C.钻床夹具高度
D.钻闲伸出长度
参考答案:A
句型转换。
1. Jack is playing basketball with his brother. (用yesterday改写)
Jack _______ _______ with his brother yesterday.
2. Our vacation was really good. (对画线部分提问)
_______ _______ your vacation?
3. What do you think of China? (改为同义句)
_______ do you _______ China.
4. We visited a Beijing Hutong last week. (改为一般疑向句)
_______ you _______ a Beijing Hutong last week?
5. His grandfather was a policeman. (对画线部分提问)
_______ _______ his grandfather _______?
生存教育就是通过开展一系列与生命保护和社会生存有关的教育活动和社会实践活动,向受教育者系统传授生存的知识和经验,有目的、有计划地培养学生的生存意识、生存能力和生存态度,树立科学的生存价值观,从而促进个性自由全面健康发展,实现人与自然的和谐统一的过程。与生命教育,生活教育并称三生教育。