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某厂生产一种玩具赛车，成本为每辆16元，现有两种销售方式：第一种是直接由厂门市部销售，每辆售价为20元，但每月支出固定费用1500元；第二种是批发给文化用品及玩具模型商店销售，批发价为每辆18元，又知这两种销售方式均需缴纳税款为销售金额的5%．

（1）求该厂这两种销售方式的月利润y（元）与售出辆数x（辆）的函数关系式；

（2）每月销售出多少辆车时，两种销售方式所获利润相等？

（3）若该厂今年5月份生产1500辆，应如何安排销售就能获利最大？最大利润是多少？

答案

（1）第一种方式y=20x-20x×5%-1500-16x

=20（1-5%）x-1500-16x=3x-1500

第二种方式y=18x-18x×5%-16x=1.1x

（2）若要两种方式所得利润相等

则需3x-1500=1.1x

解得x≈789

即当销售出约789辆车时两种方式利润所得相等；

（3）将x=1500代入两式

第一种方式3x-1500=3000；

第二种方式1.1x=18（1-5%）1500=1650；

比较可知第一种方式所得利润较大．

完形填空
完形填空。
     Some personal characteristics play an important role in the development of one's intelligence. But people
fail to realize the importance of training these factors in young people.
     The so-called "non-intelligence factors" include   1   feelings, will, motivation, interests and habits. After
a 30-year follow-up study of 8000 males, American psychologists (心理学家)   2   that the main cause of
disparities (不同) in intelligence is not intelligence   3  , but non-intelligence factors including the desire to
learn, will power and self-confidence. 
       4   people all know that one should have definite objectives, a strong will and good learning habits, quite
a number of teachers and parents don't pay much attention to   5   these factors.
     Some parents are greatly worried   6   their children fail to do well in their studies. They blame either genetic
factors, malnutrition (营养不良), or laziness, but they never take   7   consideration these non-intelligence
factors. At the same time, some teachers don't inquire into these, such as reasons   8   students do poorly.
They simply give them more courses and exercises, or   9   criticize or laugh at them. After all, these students
lose self-confidence. Some of them just feel defeated and  10  themselves up as hopeless. Others may go
astray (迷途) because they are sick of learning.  11  investigation of more than 1,000 middle school students
in Shanghai showed that 46.5 per cent of them were  12  of learning, because of examinations. 36.4 per cent
lacked persistence, initiative (主动) and consciousness (知觉) and 10.3 per cent were sick of learning.
     It is clear  13  the lack of cultivation (培养) of non-intelligence factors has been a main  14  to intelligence
development in teenagers. It even causes an imbalance between physiological (生理的) and  15  development
among a few students.
     If we don't start now to  16  the cultivation of non-intelligence factors, it will not only affect the development
of the  17  of teenagers, but also affect the quality of a whole generation. Some experts have put forward  18  
about how to cultivate students' non-intelligence factors.
     First, parents and teachers should  19  understand teenage psychology. On this basis, they can help them to
pursue the objectives of learning,  20  their interests and toughening their willpower.
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单项选择题

国家是经济上占统治地位的阶级进行统治的政治权力机关。这说明（）

A.国家不是从来就有的，它是社会发展到一定阶段才产生的

B.只有在经济上统治地位的阶级才能在政治上占统治地位

C.国家是阶级矛盾不可调和的产物

D.国家权力经过的完善和社会生产力发展水平相联系
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