球团中配加皂土的主要作用是()。
A.对焙烧有益
B.对高炉冶炼有益
C.提高生球生球强度
D.提高品位
参考答案:C
You'll find taxis waiting at the bus station ______ you can hire to reach your host family. [ ]
A. which
B. where
C. when
D. as
一团与外界无质量交换的湿空气,湿绝热上升,其位温():
A.变大
B.变小
C.不变