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【判断题】
为实现从动件的某种运动规律而设计一对心直动尖顶从动件凸轮机构。当该凸轮制造,若改为直动滚子从动件代替原来的直动尖顶从动件,仍能实现原来的运动规律。A.
正确
B.
错误
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【单选题】Which one is the duty of the lord to the king?
A.
They were obligated to come to his aid in the event of invasion
B.
They must stay in the capital of the country.
C.
The officers were nominated in their territories.
D.
They must send their son to the capital
【单选题】The principal duty of the United Nations is to safeguard the pace of the world.
A.
primary
B.
prime
C.
privileged
D.
precedent
【单选题】The principal duty of the United Nations is to safeguard the peace of the world.
A.
primary
B.
prime
C.
privileged
D.
precedent
【简答题】B It is the duty of every man to work. The life of a lazy man is of no use to himself and to others. The man who is too lazy to work is the man who is generally most ready to beg or to steal. Every bo...
【简答题】It is the duty of every man to work. The life of a lazy man is of no use to himself and to others. The man who is too lazy to work is the man who’s generally most ready to beg or steal. Every boy shou...
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