某投资项目，折现率为10%时，净现值为500元，折现率为15%时，净现值为-480元

阅读下面短文并回答问题，然后将答案写到答题卡相应的位置上（请注意问题后的词数要求）。

（1） Everybody has to buy or sell things sometimes．Even students who are usually not very rich, have

to learn something about making purchases intelligently．As a student, you may find, for example, that

you need to buy a walkman or winter clothing．You may want to buy a television or a used car．Of course,

you want to get good value for your money．If you are considering a major purchase, or any purchase you

should remember several important things．

（2） Study first, and then decide what to buy．You can get enough information just by reading books

and advertisements．

（3） Remember that a high quality product will probably last longer and work better．Of course, for a

superior product you ______________．An inferior product may not give you the same quality,

but the price could be low．A poor quality product could be expensive and a valuable one could be on sale

at a greatly reduced price．

（4） Don't worry．Take your time．After you decide what product you want to buy, go to many

different stores．If you cannot find the product you want, you try to order it directly from the factory or

ask the store to order it for you．

（5） Look for a good deal．If you wait, you may probably find that your product will go on sale and

you may be able to save 10,20, or even 50 percent of the original price．

（6） Finally, before you buy, make sure that that product is guaranteed．If you find the lowest possible

price, you will generally be happy with your purchase and also keep more money in the bank．

小题1:What is the main idea of the passage? （no more than 8 words）

小题2:What should you care more while shopping? （no more than 5 words）

小题3:Fill in the blank in Paragraph 3 with proper words．（no more than 5 words）

Of course, for a superior product you

小题4:How can you get good value for your money? （list at least two things） （no more than 20 words）

小题5:What does‘the underlined’word“one"’refer to in paragraph 3？

简述转鼓真空过滤机的工作原理

心理暗示是指用含蓄、间接的方式；对别人的心理和行为产生影响。暗示作用往往会使别人不自觉地按照一定的方式行动，或者不加批判地接受一定的意见或信念。
以下哪些对话没有心理暗示( )。

A．“你怎么这么憔悴是不是病了”
B．“你能行，待会的比赛你一定能跑第一名的”
C．“请勿在教室里吸烟”
D．“这道菜是著名的厨师做的，非常好吃，你尝尝!”

工联主义

经济学家发现，工作不稳定的人比有着稳定工作的人有更强的储蓄愿望。这表明（）

A.当前收入直接影响当前的消费水平

B.人们应转变消费观念，做理智的消费者

C.居民收入差距大小影响总体消费水平

D.未来收入预期影响当前的消费水平