根据连架杆的不同时能够运动形式，铰链四杆机构可分为（）、双曲柄机构和双摇杆机构。
通常把摇杆返回空行程速度大于工作行程速度的运动特性，称为（）。
A career
A. It may not require education or expertise.
B. It requires education and constant advances in job skills.
C. A person normally only does what is required to get the paycheck.
D. It is just the work a person does in exchange for money to make a living.
E. It refers to a lifelong process in which a person tries to achieve his professional goals.
F. A person would like to do more than what is required in order to progress, and is more concerned about job satisfaction than money.
A job
A. It may not require education or expertise.
B. It requires education and constant advances in job skills.
C. A person normally only does what is required to get the paycheck.
D. It is just the work a person does in exchange for money to make a living.
E. It refers to a lifelong process in which a person tries to achieve his professional goals.
F. A person would like to do more than what is required in order to progress, and is more concerned about job satisfaction than money.
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