吗啡主要用于.
A. 晚期癌症疼痛.
B. 急性心梗疼痛.
C. 偏头疼.
D. 内脏绞痛.
E. 关节疼.
Which of the following is not non-surgical treatment for caries lesion？
Application of fluoride
B. Cavity preparation
C. Remineralization therapy
D. Antimicrobials
E. Patient education
Which is not the non-mechanical rotary techniques of dental caries in the following?
Air abrasion
B. Tunnel cavity preparation
C. Atraumatic resin therapy (ART)
D. Chemo-mechanical technique
变桨功能的车间调试完成后，变桨角度应该为（）度。
A. 0
B. 91
C. 95
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