【简答题】用水蒸汽蒸馏测定挥发酸含量时,在样品瓶中加入少许磷酸,其目的是()。
【多选题】Factores that make the tooth extraction more difficult.
C.
divergent curved roots
D.
wide periodontal ligament
【多选题】When the local anaesthesia of infiltration and block anaesthesia failed, what other injection techniques could be used?
A.
Periodontal ligament injection.
B.
Intraosseous injection.
C.
Intrapulpal injection.
D.
One measure is the use of a stronger local anaesthetic solution.
【简答题】用水蒸气蒸馏测定挥发酸酸含量时,为防止蒸馏水中二氧化碳被蒸出,应在蒸汽发生瓶中加入无CO2蒸馏水和磷酸,在样品瓶中加入少许磷酸,其目的是
【单选题】The roots of a tooth are covered by a tissue that is harder and denser than bone and is called:
【简答题】用水蒸汽蒸馏测定挥发酸含量时在样品瓶中加入少许磷酸,其目的是 。
【简答题】当Num Lock指示灯亮时只能输入大写字母。( )
【单选题】输入大写字母,需按下哪个键即可直接输入()
【简答题】用水蒸汽蒸馏测定挥发酸含量时,在样品瓶中加入少许磷酸,其目的是 。