51÷0.17=5100÷17=300______.
51÷0.17,
=(51×100):(0.17×100),
=5100÷17,
=300;
故答案为:正确.
患者女,61岁。右上尖牙残根,拟拔除后修复。局部麻醉最好选择()
A.眶下孔阻滞麻醉
B.切牙孔阻滞麻醉
C.腭前神经阻滞麻醉
D.翼腭管传导阻滞麻醉
E.唇、腭侧局部浸润麻醉
指出加工硬化的优缺点?