问题
单项选择题
水蒸气比焓的定义式是（）。
A.h=u+s
B.h=u+rt
C.h=s+pv
D.h=u+pv
答案
参考答案：D
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水蒸气比焓的定义式是（）。
A.h=u+s
B.h=u+rt
C.h=s+pv
D.h=u+pv
参考答案：D
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| Americans like to have different kinds of parties. They think having a party is a good way for their family members and friends to get together. They can also have a lot of fun at parties. Below are some important parties in the US. Birthday Party: When people have a birthday coming up, they often have aparty. House warming Party: When people move to a new house, they often have a party.And they invite a lot of friends to the new house Baby Shower: A few days before the baby is born the new mother's friends come to throw a party for her.They bring presents and money to give the mother and her baby. Farewell Party(欢送会): This party is thrown when someone is going to leave a place or a job. During the party, friends say goodbye to each other and give best wishes to the leavingperson. | ||||||||||
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