使用手镐找活矸时应危险预知哪些伤害?()
A、碰伤他人
B、活矸滑落伤手
C、后路不畅通伤人
D、未站在合格支护下片帮掉顶伤人
E、瓦斯突出
参考答案:A, B, C, D
4.______in his office work, he had no time to attend to his sick daughter.
A.Kept engaging
B.Kept engaged
C.Keeping engaging
D.Keeping engaged
患者男,37岁,缺失,其余牙无松动,可摘局部义齿修复
为防止或对抗上述的不稳定现象而采取以下措施,不恰当的是().
A.增加间接固位体
B.消除支点
C.减小人工牙的颊舌径
D.加宽牙合支托的宽度
E.利用基托的制锁作用