What's the function of the inspection certificate7

What is the function of the brain's motor cortex？

A．It suggests people's communication.

B．It regulates bodily temperature.

C．It governs voluntary movements.

D．It affects people's heart rate.

What's the main function of steep thatched roofs？

A．To keep off extra heat.

B．To shed jungle rains.

C．To beautify the buildings.

D．To show off owners' wealth.

A.”,what is the function of the underlined part？（）

B.It's a prepositional phrase, functioning as an adverb

C.It's not a phrase, but an adverbial clause

D.I's not a phrase, but an independent clause

E.It's a prepositional phrase, functioning as the subject

B.get medicine dispensing medication

C.executed the doctor's advice

D.making the bed in being

Although people’s minds may function less flexibly as they age, they_____.

A.may be better at solving puzzles

B.can memorize things with more ease

C.may have greater facility in abstract reasoning

D.can put what they have learnt into more effective use

What' s the author' s purpose in writing this passage？

A．To show the inability of trains to compete with planes with respect to speed and convenience.

B．To stress the influence of the automobile on America' s standard of convenience.

C．To emphasize the function of travel agencies in market promotion.

D．To illustrate the important role of persuasive communication in changing consumer attitudes.

A.The thesis statement keeps you to the subject.

B.The thesis statement can show you how to develop your paper according to what method and in how many divisions-making it easier to write.

C.The thesis statement can arouse a feeling of anticipation in the reader.

D.The thesis statement can provoke the reader’s interests on the paper.

(1)假设某厂商的产量函数为q=9x^1/2,在短期，固定成本为1000美元，x为可变投入，其成本为4000美元/单位。生产q单位产品的总成本为多少？[即求出总成本函数C(q)]

(2)写出供给曲线方程。

(3)如果价格为1000美元，厂商产量为多少？利润水平为多少？在成本曲线图上表示出你的结论。

a. Suppose that a firm's production function is q=9x^1/2in the short nun, where there are fixed costs of $ 1000, and x is the variable input whose cost is S 4000 per unit. What is the total cost of producing a level o[ output q？ In other words, identify the total cost function C(q)？

b. Write down the equation for the supply curve.

e. If price is $ 1000, how many units will the firm produce？ What is the level of profit？ Illustrate your answer on a cost - curve graph.

产出的成本最小化的资本和劳动的组合？

Suppose a production function is given by F(K,L) = KL2 ; the price of capital is S 10 and the .price of labor $ 15. What combination of labor and capital minimizes the cost of producing any given output？

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.