【单选题】What benefit can the patent system offer when the patent expires?
A.
An increase in consumer well-being.
B.
A reduced price for consumers.
D.
The promotion of a desirable invention.
【简答题】V带传动中,限制带的根数 Z≤Zmax,是为了保证
【简答题】V带传动中,限制带的根数 Z≤Zmax,是为了保证每根V带 。
【判断题】企业行政部门管理部门领用材料,价值3000元,这3000元材料费应确认为企业的费用。
【简答题】V带传动中,限制带的根数 Z≤Zmax,是为了保证 。
【单选题】What can NOT be caused by a decrease or an increase in ozone?
C.
Harm animals and fish.
D.
Increase in temperature.