等速运动规律的盘形外轮廓凸轮机构适用于()场合。
A.高速、重载
B.低速、轻载
C.中速、中载
D.高速、中载
参考答案:B
改写同义句。
1. How much is this Walkman?
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2. How do you like your school life?
3. My father usually goes to work on foot.
东风悦达起亚销售本*部落户南京的时间是()
A.2008/11/28
B.2008/10/28
C.2009/10/28
D.2009/11/28