多项选择题 1．下列各项中，属于无形资产特点的有（）。 A．无实体性 B．长期性
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绝缘靴的试验周期是（）一次。
A. 每年
B. 六个月
C. 三个月
回答（56）题 查看材料
A. manage
B. lower
C. meet
D. increase
What are Parisians famous for？ 查看材料
A. Their pursuit of independence.
B. Their enthusiasm for conversation.
C. Their ability to keep the city flourishing.
D. Their devotion to developing a multiple culture.
回答（12）题 查看材料
A. conditions
B. reports
C. forecast
D. event
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