模锻件的分类有（）。
A.短轴和长轴线类
B.细轴和粗轴线类
C.短轴和细轴线类
D.长轴和粗轴线类
参考答案：A
John, you must get your room ________ after breakfast. [ ]
A. to be cleaned
B. to clean
C. cleaning
D. cleaned
跟踪误差是衡量资产管理人管理绩效的指标。( )
after breakfast. [ ]