题目内容
（请给出正确答案）
A.consumers get tired of goods and use less of them
B.consumers want more variety in goods and services
C.a higher price for a good reduces the consumer’s desired consumption of a good
D.a lower price for a good reduces the consumer’s desired consumption of a good
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更多“Why are most demand curves dow…”相关的问题
根据以下资料，回答{TSE}题。
{TS}“…we will need to cure our addiction to oil．”Why does the author say so？
A. Most of the energy on Earth comes from the Sun．
B. Oil supply is increasing all the time．
C. Demand for oil is increasing all the time．
D. Oil supply is decreasin9．
下面，请听 18～20 题。
第 18 题 Why are "How To" books in great demand in the United States？
Why is there an increasing demand for ceramics in U。S．？
A.Its cheap．
B.Its in good quality．
C.Its very tradition but has modern designs．
Why have Venezuelan oil workers gone on strike？
A．They demand a pay increase.
B．They want a hundred dollars.
C．They did not like their boss.
Why is the demand for shark fins rising in Asia？
A．Because there are fewer sharks in Asia.
B．Because shark fins can be used for medical purposes and for food.
C．Because shark fins are poisonous.
D．Because shark fins are expensive.
Why does the group demand the changes in the distribution of the funds？
A．To hold back funds for level2 departments.
B．To help the teachers not active in research.
C．To encourage some teachers to be better educators.
D．To attract research money.
When the Dutch first sailed up the Hudson River 300 years ago, they discovered black walnut trees so large that the first branch was as much as 70 feet above the ground. In colonial times the black walnut became one of America's first exports, because it was highly prized by cabinetmakers. During World War I almost all natural woods of the black walnut were eliminated. Trees were harvested for gun stocks, and even the nutshells were collected to use as filtering material in gas masks.
Today, growing black walnut trees is profitable because of the demand for it. However, not every black walnut tree is necessarily valuable. It must be inspected to see if it meets certain standards. Furthermore, the roots of the black walnut tree produce a poisonous substance that will cause harm to tomatoes, potatoes, blackberries and apples.
Why is the black walnut tree so valuable7
A．Because of its hardwood and its beauty.
B．Because of its historic value.
C．Because of its great age.
D．Because of its great size.
Why do some people believe that advertising has a positive impact on the economy？
A．Because it stimulates demand for products and services.
B．Bemuse it stimulates the development of society.
C．Because it promotes the sale of goods and services.
D．Both A）and C）
According to the passage, why do workers want more money？
A．Because their jobs are too boring.
B．Because they want to enjoy more spare time.
C．Because they want to make their jobs more interesting.
D．Because they demand shorter working hours.
