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【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.
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【单选题】有关数控机床坐标系的说法,其中()是错误的。
A.
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B.
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C.
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D.
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