The price are rising __ they expected.

output of cement in the factory ________ by about 10%.

A) will have risen B) has risen

C) will be rising D) has been rising

A.e-mail

B.refund

C.discount

D.price of the product

E.wholesale price

r zero, show that the substitution effect of a price change for a good is zero.

A.approach

B.means

C.way

D.method

A.Product

B.place

C.Promotion

D.Price

A.for

B.by

C.ith

D.as

__ which a price change will affect supply and demand.

A) from B) with C) to D) for

The price of beer _______ from 50 cents to $4 per liter during the summer season.

A) altered B) ranged C) separated D) differed

What is the underlying reason that maximum profit comes at the level of output where marginal cost equals price（)。

A、there is additional profit as long as the price is greater than the marginal cost of the last unit

B、there is additional profit when the marginal cost of a unit is higher than the price

C、there is no more profit when the price is greater than the marginal cost of the last unit

D、price is not important in determining profit

E、none of the above