题目内容

氢在钢中溶解与其分压的关系是()。

A. [H]=KH(PH)1/2
B. KH*PH=[H]
C. [H]= KH*PH2
D. [H]= KH1/2*PH

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To make a correct mix for dental stone when using 50g ofpowder,the amount of water wouldbe

A. 10~12ml
B. 14~15ml
C. 28~30ml
D. 45~50ml

The desirable strength ofgypsum materials is()related to the amount ofwater used

A. Directly
B. Indirectly
C. not
D. partially

控制石膏材料凝固速度的方法有哪些?

钢中气体主要指氢和氮,一般来说()的含量较高,且较难去除。

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