对成型旋模比的描述,正确的是:()
A.生产时可随时调整
B.根据生产规格调整
C.旋模转速任意
D.机台全部统一
参考答案:B
Unfortunately, the badly injured people in the big fire died _____.[ ]
A. each other
B. one after another
C. one after one
D. one another
消费者的收入水平、偏好、对未来的预期和相关物品价格水平的变化,会改变消费者在给定价格水平下对房地产的需求量。( )