题目内容

熔炼铜合金常用脱氧方法?

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Advantages of zinc polycarboxylate cement include which of the following()

A. kindness to the pulp
B. 10ng working time
C. chemical adhesion to tooth structure
D. All of the above

提高铝液除氢速度的措施?

熔炼铝合金,经常搅动铝液带来哪些危害?

The amount offluoride released by a GIC()when intraoral pH decreases

A. increases
B. decreases
C. does not change
D. polycarboxylate cement

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