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【单选题】
导热问题的第二类边界条件是( )A.
已知物体边界上的温度分布
B.
已知物体表面与周围介质之间的换热情况
C.
已知物体边界上的热流密度
D.
已知物体边界上流体的温度与速度
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A.
正确
B.
错误
【简答题】Calculate the molar concentration of 98.1 % mass percentage sulfuric acid ( d = 1.84 g·mL -1 ).
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A.
60.1 g/mol
B.
70.1 g/mol
C.
80.1 g/mol
D.
90.1 g/mol
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【简答题】Calculate the molar concentration of 98.1 % mass percentage sulfuric acid ( d = 1.84 g·mL -1 ).