设3阶方阵A、B的行列式分别为det（A)=2，det（B)=3，则det（-2A-1B*)=

A．structure of a firm.

B．profitability of a firm

C．demand for a firm's product.

D．supply of a firm's product.

A、the determination of output in competitive markets.

B、the tradeoffs inherent in decisions made by consumers.

C、how consumers select inputs into manufacturing production processes.

D、the determination of prices in competitive markets.

【题目描述】

Consumer confidence fell______ April.A．next

B．on

C．in

D．the

解析：In is used to indicate time during a month. Choice (A) may be used with month but indicates the immediate future. Choice (B) is used with dates. Choice (D), the, is not used with names of months.

detailed reason ？

A、importance of property rights in creating efficient markets

B、ability of a single economic actor to have a substantial influence on market prices

C、the trade-offs that people face in their role as purchasers.

D、All of the choices are correct.

A、Consumers can measure the utility they get from all bundles of goods.

B、Consumers can rank all bundles of goods.

C、Consumers have complete information.

D、None of the other answers are assumptions made in consumer behavior theory.

A．the consumer is used to the fact that the individual's pursuit of happiness and success is usually in vain

B．adverts are factual statements about reality

C．the consumer can come into the realms of imagination pictured by adverts

D．adverts can make the consumer's dream come true

A、FR/microwave frequency

B、the optical field

C、lower frequency

D、any frequency

An example illustrating whether there are limitations on consumer choice is that ______.

A．rights holders can at any time set pricing and access rights for their works.

B．people have to fly to a certain library to find a typical out-of-print book

C．other rights holders will be encouraged to conduct similar projects

D．google is working hard to improve bibliographic information

A、be sit in

B、be stand in

C、be derived from

D、be situated in