男,26岁。左下颌智齿拟在局麻下拔除。若使用涡轮机拔牙,其特点中错误的是()
A. 震动小,创伤小
B. 手术野清楚
C. 采用普通牙科用涡轮机头可完成
D. 手术时间短
E. 术后并发症少
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来自5m远的光线,经过调节静止的眼的屈光系统后,焦点落在视网膜之后,应称之为
A. 远视
B. 近视
C. 正视
D. 屈光参差
正步双脚的动作要领是左脚向正前方踢出,腿要绷直,脚尖下压,脚掌与地面平行,离地面()厘米,适当用力使全脚掌着地。
A. 10
B. 25
C. 35
D. 45
You are planning a new VLAN-based network solution. What is one item you should consider when creating your implementation plan as it concerns VLANs?()
A. generic router and switch configuration parameters
B. end-to-end test plan after all components have been installed and configured
C. administrator assignments
D. rollback pla
二尖瓣狭窄伴快速房颤()阵发性室上性心动过速()急性广泛心肌梗死()输液过快过多()
A. 左室排血量急剧下降
B. 左室舒张期过短
C. 左室充盈障碍
D. 左室舒张期负荷突然加重
E. 左室后负荷突然明显加重