【单选题】In economics, demand implies something slightly different from the common meaning of the term. The layman, for example, often used the term to mean the amount that is demanded of an item. Thus,if the ...
A.
increases as price decreases
B.
can be predicted if there is a change in price
C.
remains constant at the same price
D.
is influenced by changes in the consumer's income and tastes
【简答题】An old friend from the US whom I was looking forward to staying with , telephoned from the airport to tell me that he had arrived . I was still at the at that time , but I had got everything ready for...