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【多选题】
下列术语中( ) 是植物划分生长型的术语
A.
高位芽植物
B.
乔木
C.
灌木
D.
地面芽植物
E.
草本植物
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参考答案:
举一反三
【单选题】The existence of external economies of scale _______.
A.
tends to result in large profits for each firm.
B.
may be associated with a perfectly competitive industry.
C.
cannot be associated with a perfectly competitive industry.
D.
tends to result in one huge monopoly.
【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
【判断题】对慕课课程设计者来说,了解论坛参与者的特征、行为和利用论坛的方法,可以找出现有课程的不足,还可以形成课程改革的方案。
A.
正确
B.
错误
【判断题】对慕课课程设计者来说,了解论坛参与者的特征、行为和利用论坛的方法,可以找出现有课程的不足,还可以形成课程改革的方案。
A.
正确
B.
错误
【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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