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【单选题】
建设社会主义文化强国,必须大力发展文化事业和( )。A.
文化产业
B.
文化制度
C.
文化工程
D.
文化产品
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反馈参考答案：
举一反三
【简答题】设计就是为了解决产品上碰到的问题而发挥作用的。
【单选题】We generally take the convention of safety of life at sea adopted in 1974 as a completely new convention, the reason is _____.
A.
it included the amendments agreed up until that date
B.
it included none of the amendments agreed up until that date
C.
it required two thirds of the Parties’ acceptance for a amendment to enter into force
D.
it included a tacit acceptance procedure
【简答题】证明折射光束的方向是等光程方向．即证明图1-14中 L(A 1 B 1 D 1 )=L(A 2 B 2 D 2 )．
【简答题】设D=[0，1]×[0，1]，证明函数 在D上部可积。
【简答题】证明 若Dξ=0，则{x=Eξ}=1．
【单选题】We generally take the convention of safety of life at sea adopted in 1974 as a completely new convention, the reason is（）
A.
it included the amendments agreed up until that date
B.
it included none of the amendment agreed up until that date
C.
it required two thirds of the Parties’ acceptance for a amendment to enter into force
D.
it included a tacit acceptance procedure
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