Jason is a very intelligent man．He often finds the solutions to some difficult problems．题目和参考答案——青夏教育精英家教网—

题目内容

20．Jason is a very intelligent man．He often finds the solutions to some difficult problems．

分析 Jason是一个很聪明的人．他能够经常找到一些困难问题的解决办法．

解答答案：intelligent．
根据后面的句子He often finds the solutions to some difficult problems．可知，他应该是一个聪明的人，结合首字母可知答案为intelligent．

点评首字母填空题考查的是词汇的记忆和运用能力，平时要注意积累和运用．同时还要注意提示字母．

练习册系列答案

11．The U．K________ Scotland，England，Wales and Northern Ireland．（　　）

8．假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文．文中共有10处语言错误，每句中最多有两处．错误仅涉及一个单词的增加、删除或修改．增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词．删除：把多余的词用（\）划掉．
修改：在错的词下画一横线，并在该词下面写出修改后的词．
注意：1）每处错误及其修改均仅限一词；
2）只允许修改10处，多者（从第11处起）不计分．
Last week we held a English story-telling competition．We required that the entries be original and interested and be presented with English within five minutes．Every member took an actively part in the activity．Two foreign English teachers are invited to act as judges．At last Li Ping won first place．Many members said the activity benefited from them in many ways．Not only did it improved their spoken English，but also it brought them many fun．They hope many such activity can be held in the future．

15．Seeing the happy _____ of children playing in the park，I'm full of joy and confidence in the future of our country．（　　）

5．--We are planning to have a casual get-together this Saturday．Are you
coming？
--_______．I've got rather a full day this weekend．（　　）

	A．	I hope so		B．	Sounds great
	C．	I'm afraid not		D．	You'd better not

12．Sometimes a thief can lose （66）more （much） than he gains．Once in a supermarket （67）a thief wanted to steal the money out of the till （装钱的盒子）．So he went into the shop and put a lot of groceries into his basket．
（68）When he reached the counter to pay，he put the groceries down on the counter．The girl started （69）tocount（count） up how much they cost and then she （70）showed（show） the thief the price of the groceries．He put down a ten pound note （71）on the counter and the girl opened the till （72）which（that） contained all the money．（73）Suddenly （sudden） the thief grabbed the money and ran leaving the girl （74）holding （hold） the ten pound note．When the police heard about （75）it/this they laughed because the till had only contained four pounds fifty and so the thief had lost fifty in his action!

9．The weather is changeable here．Please take more clothes．
_________．（　　）

	A．	Well，it depends．		B．	It's a pleasure
	C．	OK，just in case．		D．	Take your time．

5．

Fuel Cell Technology for Cars
Fill her up with hydrogen？That's what someCalifornia motorists may be saying soon，as car makers tryto speed up production of zero emission（零排放） cars to meet state requirements in the near future．
Beneath the skin of this ordinary looking Hondas FCX Concept Vehicle sits an electro-chemical reactor：a hand built，astronomically expensive power plant known as a fuel cell．It's expected to be running ordinary family cars on California's roads within three years．
So what exactly is a fuel cell，anyway？Why are governments，private businesses and academic institutions cooperating to develop and produce them？A fuel cell，very simply described，is a power generator，making electricity through the combination of hydrogen and oxygen．Fuel cells generate electrical power quietly and efficiently，without pollution，Unlike power sources that use fossil fuels，the only by-products from an operating fuel cell are heat and water．To be more technical about it，a hydrogen atom with its one electron，attempts to pass through a fuel cell membrane（膜） to unite with an oxygen atom．The membrane allows only the hydrogen proton（质子） to pass through，forcing its electron to run around the membrane to catch up with the proton on the other side．This creates electricity，water，and heat，but no exhaust emissions．
If the fuel cell is powered with pure hydrogen，it has the potential to be up t0 80-percent efficient，That is，it turns 80percent of the energy content of the hydrogen into electrical energy．However，we still need to turn the electrical energy into mechanical work．This is accomplished by the electric motor．A reasonable number for the efficiency of the motor is about 80percent．So we have 80-percent efficiency in generating electricity，and 80-percent efficiency turning it into mechanical power．That gives an overall efficiency of about64percent．Honda's FCX concept vehicle reportedly has 60-percent energy efficiency，which is twice or even three times more efficient than usual cars．
But in spite of all the advantages described above，experts say，"We still have technical challenges getting this extremely complex system to work properly，the way customers expect it to work．There are challenges in using new fuels，and providing the new fuel basic facilities．And before fuel cell vehicles hit the road，there will have to be a network of hydrogen stations that will allow drivers to fill up with the flammable gas，under 36-hundred pounds of pressure．"

61．What can be inferred from California's"zero emissions policy"？C
A．New cars with fuel cell technology will surely become much cheaper．
B．By carrying out the policy，traffic will not be so busy as it is now．
C．The quality of life in California will improve once this policy is in effect．
D．With facilities of new kinds，more local employment will be created．
62．What does the phrase"power plant"refer to？A
A．A power device generating electricity．
B．A power station providing electricity．
C．A power component consuming electricity．
D．A power engine using electricity．
63．One of the reasons why fuel cell powered vehicles are superior is that．C
A．they give out almost no water or heat
B．they run faster and more smoothly
C．they give out almost no noise
D．they turn 64% of the energy into electricity
64．What does the author want to tell us in the last paragraph？D
A．Customers will not think it a good idea to develop fuel cell technology．
B．It is still not very easy to speed up production of zero emission cars．
C．We can't ignore the financial problems to build a network of hydrogen stations．
D．We still have much difficulty turning all the chains of the business into reality．

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