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【单选题】
已知一个部门有多个职工,一个职工只在一个部门上作;一个职工参加多个项目,一个项目可由多个职工完成。则部门和职工间、职工和项目间的联系分别是 ______。
A.
1:n 1:n
B.
1:1 1:n
C.
m:n m:n
D.
1:n m:n
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words
B.
allomorphs
C.
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D.
morphs
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A.
Hot-strength low-alloy
B.
High-strength low-alloy
C.
High-strain low-alloy
D.
High-strength light-alloy
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A.
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B.
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A.
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A.
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A.
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B.
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C.
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D.
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A.
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C.
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D.
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A.
product placement is common in movie and TV shows
B.
children's unhealthy behaviors are caused by advertising
C.
marketers make the use of the Internet and social media to promote thier products
D.
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