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【单选题】
计划是对未来的规定,难免有预测不到的地方,因此,计划写作时的要求是()A.
留有余地
B.
实事求是
C.
模糊不清
D.
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【简答题】In them, there are tangible products can be creation such as automobile or a computer. Among organizations that do not create physical products, often when services are performed, intangible goods are...
【单选题】there are intangible benefits beyond a rise in the share price.
A.
visible
B.
invisible
C.
abstract
D.
specific
【单选题】How many intangible cultural heritages are there in China by the end of 2018.
A.
40
B.
41
C.
50
D.
51
【简答题】试求题4．25图所示周期信号的频谱函数。图(b)中冲激函数的强度均为1。
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