【单选题】最佳资本结构是指企业在一定关条件下预期的( )。
【单选题】Which statement is not true about this study?
A.
The study still needs further research before arriving at some solid conclusion.
B.
The study does not seem to support the global teenager hypothesis.
C.
The study shows some cultural difference among the countries.
D.
The study confirms researchers’ guesses about the global teenager culture.
【单选题】合金液体的浇注温度越高,液态合金的流动性越 ,合金的收缩率越 。选()。
【单选题】关于液态金属在凝固过程中形成缩孔和缩松的倾向,正确的说法是( )
【判断题】浇注温度越高,金属的液态收缩越大,总体收缩也越大。
【单选题】Next the author will most probably talk about ______.
A.
the study of economics
【判断题】铸造时需要考虑合金的收缩率,收缩率与浇注时液态金属的温度有关,浇注温度越高收缩率越大。