单项选择题

A layman in this field______ this type of approach to improving work efficiency.

A．originated
B．speculated
C．generated
D．manufactured
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单项选择题
I don't think he is that innocent, I think he did it______.
A．tiresomely
B．intentionally
C．incidentally
D．pertinently
单项选择题
The third category relates to private______, where an equality of bargaining power is usually to be presumed.
A．stimulation
B．transactions
C．transition
D．solutions
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