题目内容

若要使凸轮机构压力角减小,应增大基圆半径。

A. 对
B. 错

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与连杆机构相比凸轮机构结构紧凑,响应快速。

A. 对
B. 错

A person who keeps financial records and does tax forms is a(n) ______.

A. accountant
B. plumber
C. priest

A person who organizes files, manages correspondence, and provides support is a(n)______.

A. nanny
B. administrative assistant
C. architect

A person who sells houses, property, and buildings is a ______.

A. waiter
B. journalist
C. real estate agent