单项选择题

With which of the following topics is the author primarily concerned

A．The effects of climate on the economy.
B．The relation between market prices and technological change.
C．The effect of shifts in supply and demand on market prices.
D．The increasing cost of skilled labor.

<上一题目录下一题>

热门试题

单项选择题

The author attributes changes in the prices of goods such as handmade chairs and pocketbooks to

A．the fact that these articles are bought by museums
B．the changes in technology that have made such goods cheaper
C．the changes in power supply caused by shrinking oil and mineral reserves
D．the fact that few are being made and so are more expensive to make

单项选择题

Which of the following is NOT mentioned as an effect of bad weather

A．Power failure.
B．Illness among workers.
C．Transportation problems.
D．Production delays.