上前牙PFM全冠颈缘预备至少()。 ["1.5~2.0mm","0.35~0.5mm","0.8~1.5mm","1.8~2.0mm","2.0mm以上"]
上前牙PFM全冠邻面预备至少()。 ["1.5~2.0mm","0.35~0.5mm","0.8~1.5mm","1.8~2.0mm","2.0mm以上"]
上前牙PFM全冠舌侧预备至少()。 ["1.5~2.0mm","0.35~0.5mm","0.8~1.5mm","1.8~2.0mm","2.0mm以上"]
医院使用的锐器(针头、穿刺针等)用后应放入防渗漏、耐刺的容器内,然后进行无害化处理。
利用微束等离子弧束焊接不锈钢、钴铬合金的焊接方法是()。 ["冷压焊","气压焊","锡焊","微束等离子弧焊","气焊"]
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