一般来说,某种房地产的价格越高,开发商愿意开发的数量就会越多;相反,开发商愿意开发的数量就会越少。()
参考答案:对
Lucy is ________ university student. She likes playing _______ piano.
A.a; /
B.a; the
C.an; the
D.an; /
焦炉煤气主要有哪些性质?