制订国家电网公司电力安全工作规程的目的是什么?
参考答案:
为加强电力生产现场管理,规范各类工作人员的行为,保证人身、电网和设备安全。
患者男,67岁,缺失,缺牙间隙较小,约3mm,下颌牙列缺失,余留牙正常
为该患者进行固定义齿修复时,着重需要考虑的是下列哪一项()
A.基牙倒凹的深度和坡度
B.基牙牙冠的颌龈高度
C.基牙的支持能力
D.基牙与修复体之间就位道的关系
E.基牙的固位形
Directions:
You are a teacher of English. The editor of Campus News asked you to recommend two English books for students to read during the summer. Your article should include:
1) brief introductions to the books; and
2) reasons for your recommendation.