题目内容
（请给出正确答案）
[单选题]
这些是什么（）
A.What's this
B.What are those
C.What are these
答案
C、What are these
如果结果不匹配，请 联系老师 获取答案
题目内容
（请给出正确答案）
答案
如果结果不匹配，请 联系老师 获取答案
题目内容
（请给出正确答案）
A.What's this
B.What are those
C.What are these
答案
C、What are these
如果结果不匹配，请 联系老师 获取答案
更多“这些是什么（）”相关的问题
What is the author's attitude towards the eating habits in Brazil？
A．The author doesn't think much of them.
B．The author likes those in the U. S. better.
C．The author appreciates them very much.
D．The author shows no emotions whatever.
What is the 'biggest city in the world？ That is, (21) city has the largest population？ This seems like (22) question to answer, but actually it isn't.
It's actually rather difficult to say which cities (23) the largest. There are two reasons for this difficulty. First of all, it isn't easy to determine a city's boundaries, that is, where a city ends. Nowadays, nearly all cities have a large (24) area around them. So when we talk about the population of a city, we often mean the population of the whole metropolitan area around the city. That means that it's difficult to determine what the population of a city is because it's difficult to define what a city is.
The second reason that it is difficult to 25 the population of different cities is this: it is almost impossible to get (26) about the population of all cities for the same year. For example, we might get an estimate of New York's population in 1979 and an (27) of Mexico City's population in 1981. So we real ly can't compare the numbers because the information is for (28) different years. And the population of cities changes rather quickly, especially in some cases. For example, the population of Jakarta, Indonesia, may increase by 5% each year, so the population figure will change rather quickly.
So we can say that these are our two (29) for comparing the populations of cities: one, it's difficult to determine the (30) of a city, and two, it is difficult to get accurate information.
21. A. what
B. which
C. where
D. how
A.What's your hobby
B.My hobby is making models
C.What do you like doing
A.What’s that
B.What are they
C.What colour
下表显示了一个以常数边际成本10美元生产的垄断者面临的需求曲线。
(1)计算该厂商的边际收益曲线。
(2)该厂商的利润最大化产量和价格是多少？该厂商的利润为多少？
(3)在一竞争性行业中均衡价格和数量各为多少？
(4)如果该垄断者被迫以完全竞争的均衡价格生产，社会得益是什么？结果是谁获益谁受损？
The following table shows the demand curve facing a monopolist who produces at a constant marginal cost of $ 10.
a. Calculate the firm' s marginal revenue curve.
b. What are the firm's profit - maximizing output and price？ What is its profit？
c. What would the equilibrium price and quantity be in a competitive industry？
d. What would the social gain be if this monopolist were forced to produce and price at the competitive equilibrium？ Who would gain and lose as a result？
提示：Joe和Henry谈起报上的一篇文章，Henry问什么报，什么文章。他没用读完这篇文章，但标识下午要读，然后告别。
Joe ：Hi， have you read today‘s newspaper？
Henry：_________1___________？
Joe ：The People‘s Daily.
Henry：________2__________. But I only looked through it while having lunch.
Joe ：Did you notice an interesting article？
Henry：___________3___________？
Joe ：About air pollution.
Henry：________4__________. On which page？
Joe ：On page 5. At the bottom.
Henry：Good. I‘ll read it this afternoon.
Joe ：Don‘t forget to tell me what you think after reading it.
Henry：Sure. __________5__________.
Joe ：See you.
A firm uses cloth and labor lo produce shirts in a factory that it bought for S 10 million. Which of its factor inputs are measured as flows and which as stocks？ How would your answer change if the firm had leased a factory instead of buying one？ Is its output measured as a flow or a stock？ What about its profit？
一家企业的固定生产成本为5000美元，边际生产成本为常数，为500美元/单位产品。
(1)企业的总成本函数是什么？平均成本呢？
(2)如果企业想使其平均总成本最低，它应该选择非常大的产量还是比较小的产量？解释你的结论。
A firm has a fixed production cost of $ 5000 and a constant marginal cost of production of S 500 per unit produced.
a. What is the firm' s total cost function？ Average cost？
b. If the firm wanted to minimize the average total cost，would it choose to be very large or very small？ Explain.
(1)所有计算机专业二年级的学生在学离散数学课.
(2)这些且只有这些学离散数学课的学生或者星期一晚上去听音乐会的学生在星期一晚上很迟才睡觉.
(3)听离散数学课的学生都没参加星期一晚上的音乐会.
(4)这个音乐会只有大学一、二年级的学生参加.
(5)除去数学专业和计算机专业以外的二年级学生都去参加了音乐会
