单项选择题

Which of the following statements about intellectual property is NOT true

A．Countries may differ in their efforts to protect it.
B．The author considers its protection well-grounded.
C．People believe its protection may benefit creators.
D．The history of its protection has not been long.
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单项选择题
The word obscurities in the second paragraph most probably means ______.
A．misunderstanding.
B．small potatoes.
C．well known people.
D．unclearness.
单项选择题
According to the passage, studies on the results of copyright protection ______.
A．lag behind the research in other fields,
B．need to be done in a practical way.
C．should be carried out immediately.
D．will promote cultural innovation.
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