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【单选题】
下列陈述中属于广义社会对话的特征的是（）A.
社会对话目标是在参与群体之间达成共识，并签订合作协议
B.
参与对话的主体是政府、雇主（或雇主组织）和雇员组织
C.
社会对话是劳动关系领域的民主治理机制
D.
对话主体是发生在劳动关系领域的，涉及政府、雇主和雇员三方利益的当前问题
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【简答题】External economies外部经济
【单选题】The existence of external economies of scale
A.
may be associated with a perfectly competitive industry.
B.
cannot be associated with a perfectly competitive industry.
C.
tends to result in one huge monopoly.
D.
tends to result in large profits for each firm.
E.
focuses more on individual firms than the industry as a whole.
【多选题】停留服务期间。全陪应做好协助地陪的各项工作,保障旅游者的安全包括一下哪些方面()
A.
汇报旅游团情况，配合地陪做好工作
B.
维护保障游客的安全
C.
检查各站的服务质量
D.
增加游客的购物次数
【单选题】The existence of external economies of scale
A.
focuses more on individual firms than the industry as a whole.
B.
tends to result in one huge monopoly.
C.
tends to result in large profits for each firm.
D.
cannot be associated with a perfectly competitive industry.
E.
may be associated with a perfectly competitive industry.
【单选题】In the presence of external economies of scale, trade
A.
may or may not improve welfare in both countries.
B.
will unambiguously improves welfare in both countries.
C.
will unambiguously worsens welfare in both countries.
D.
will unambiguously worsen welfare in the exporting country and improve welfare in the importing country.
E.
will unambiguously improve welfare in the exporting country and worsen welfare in the importing country.
【单选题】In the presence of external economies of scale, trade
A.
will unambiguously worsens welfare in both countries.
B.
will unambiguously worsen welfare in the exporting country and improve welfare in the importing country.
C.
will unambiguously improves welfare in both countries.
D.
will unambiguously improve welfare in the exporting country and worsen welfare in the importing country.
E.
may or may not improve welfare in both countries
【简答题】设微分方程通解为y=C 1 +lnC 2 x，试讨论怎样给定初始条件，可得唯一特解，以及特解的定义域．
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