【简答题】Calculate the social welfare under perfect competition. Compared with perfect competition, calculate the dead weight loss under the Cournot competition?
【单选题】Which of the following is not true in the long run under perfect competition?
A.
There is no incentive for firms to enter or exit the industry.
B.
Economic profit is zero.
C.
Long-run marginal cost is minimized.
D.
Long-run average total cost is minimized.
【单选题】The bike under the tree ________ belong to Hilary. Look! Her bag is on it.
【单选题】In long-run equilibrium under perfect competition
A.
price will equal minimum average fixed cost.
B.
firms will earn economic profits due to the existence of barriers to entry.
C.
the demand curve facing individual firms will fall to the level tangent to the minimum average total cost curve.
D.
firms will produce at the level of output where marginal revenue exceeds marginal cost by the greatest dollar amount.
【单选题】My grandma still treats me like a child.She ca
A.
29. My grandma still treats me like a child.She can , t imagine grownup. (重庆) A.my
【单选题】Under what condition can you apply future perfect?
A.
future events which are fixed and can be confirmed
B.
something will end by a certain time
C.
the event has not been known
D.
the event which takes place in our lives so often
【单选题】Where are the basketballs?
【单选题】当电子邮件在发送过程中有误是,则( )
C.
电子邮件会将原封邮件退回,并给出不能寄达的原因
【简答题】请阅读资料栏里的“GB/T 15834-2011 标点符号用法.pdf”,并写写自己的感受(例如:关于标点符号的定义及其用法,通过本次阅读了解到哪些在未阅读前不知道的,或者自己经常犯的错误,以及本次阅读对后续应用文写作的帮助等)。