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【单选题】
下列哪一项是造成进入限制的自然原因:A.
特许经营
B.
资源控制
C.
专利
D.
许可证制度
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反馈参考答案：
举一反三
【简答题】考虑客观因素时应注意的几个问题有哪些?
【单选题】I________ along the street looking for a place to park when the accident________ . [ ]
A.
went; was occurring
B.
went; was occurred
C.
was going; occurred
D.
was going; had occurred
【单选题】I ____ along the street looking for a place to park my car when the accident _____. [ ]
A.
went; was occurring
B.
went; occurred
C.
was going; occurred
D.
was going; had occurred
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