1
1Shortly before taking off
2to read the safety flight leaflet 3buy duty free goods
4this flight leaves for new york early in the afternoon,july 19,beijing time
1tickets to the games sell well
2tickets to the concert can be obtained from the student onion
3to give students information about weekend activities on the campus 4ti is a good time for winter sports 2
1friends
2he risked his health and life,devoting himself to scientific research 3a fairly normal life
4he knows one of steven hawking;s books
1not mentioned
The man and his family can enjoy the outdoor life there 3he is a loving father and a responsible citizen 4the man is always trying to improve himself 3
1to target a very large group of readers
2That the advertiser is trying to influence you
3to get its readers to buy a product or take a certain action 4advertisements may affect people’s ways of thinking
1she doesn’t want to be different from other team members 2they may be comfortable but are too expensive
3He did not want to spend a lot of money buying joyce adidas shoes 4joyce rarely played sports before 4
1take off your shoes even if they are clean before entering 2you had enjoyed the food
3they are considerate king and sympathetic
4what well mannered people in the east and west do or do not do
1to let the guests enjoy a moment of calm and peace
2ti can be both formal and informal buy all has the same purpose 3joyful and clam
4Chanoyu isis atypical japanese style of entertainment
5
1a lawyer
2whether women should have a career 3marriage and children
4if she remains single or childless
5nancy is not going to give up her study of law
1he has not clearly revealed his opinion yet
2should ownership of private handgums be banned or not 3opinions differ greatly on the question of private guns 6
1savings account
2pays you interest every month on the money you have deposited 3about 5150
4To provide safe deposit boxs for customers who want to store their valuables and important documents
5it is not easy to get a bank loan unless you have a good economic record
1how money developed and what functions it performs 2people exchanged one thing for another
3commodities are measured carefully,using a currency that is acceptable to both buyer 4in england 5cloth and metal 7
1a much polluted environment
2we are producing more and more rubbish and leaving it everywhere 3becoming environmentally friendly 4human beings will finally be poisoned
5to save our planet,it is essential that we educate people about the importance of environmental protection
1how much paper an average person uses in a year 2enough to build a pile as high as a two story house
3forests will disappear at an alarming rate of 90million trees per year 4to urge everyone to use less paper
5fouests are easy to destroy but hard to restore 8
1does her shopping for the week
2fruit,meat,and wines and spirits sections 3lily was too heavy for her mother to carry 4played with a bottle of whisky
5the supermarket’s detective system was quite effective in one way
1her friend lisa convinced her that the paintings at the paintings at the show would be individual 2individual
3to show her the paintings 4extremely fascinating
5artists can paint the same object in different ways yet produce equally good effects 9
1what kinds of food we should eat every day 2eat a variety of food every day
3how to find ways to feed them and to make sure that they eat the right kinds of food every day 4having the right kinds of food is equally important to having enough food
1sandwiches
2they consume nearly13of their meals there every years 3it remains debatable
4their many varieties from basic to exotic,that suit individual tastes 5The hamburger is a king of sandwich 10
1because a large number of londoners are from immigrant families 2the millennium bridge the london eye and the tate modern
3it offers visitors both traditional sights and many newly built attractions
4london offers wonderful sights to tourists of different age groups and with different tastes or interests
1on business
2because the footlights on the magnificent buildings and palaces makes the city look like a wonderland at night
3cruise on the river seine
4sam took advantage of his business trip to paris to do some sightseeing 11
1the local healthe authority refused to ay for her treatment 2the believed the girl had very little chance of survival
3somebody who did not reveal his or her name donated the money needed 4she is firm in continuing her fight against the disease 5jaymee is a very brave girl for her age
1the newspaper reports that he had had an affair with his secretary 2to show a greater concern for the earth than for their own countries 3a prisoner escaped
4workers in wales must be delighted at the news about the computer company kb grant
12
1the amount of intelligence a person is born with 2how environment affects people’s intelligence 3by relying on their won beliefs
4because they look at the issue from different angles 5defining the term intelligence
1soon after his second birthday
2he could not only ring up customers tickets but also got it right 3they want to see gordon’s performance with their own eyes 4correct him
5cordon enjoys helping arround in the restaurant 13
1every year on october 24 in all ummember countries 2who
3To inform people of the work of various un agencies 4to collect more funds for the un
1to mark the fouding of the first settlement on the continent 2it is their national day
3their high standard of living
4australians have a great respect for their country’s history 14
1it has about 00000
2the great amount and variety of informantion available to the user 3it is faster and cheaper than traditional mail service
4doctors in any country can get the world is latest medical informantion througe the internet 5post offices are losing quite alot of business
1advantages of the fourth generation of ioad 2It is particularly good for business travelers 3music lovers
The new ipod is an improve ment on the ipod mini
交流电桥是一种比较式仪器，在电测技术中占有重要地位。它主要用于测量交
流等效电阻及其时间常数；电容及其介质损耗；自感及其线圈品质因数和互感等电 参数的精密测量，也可用于非电量变换为相应电量参数的精密测量。
常用的交流电桥分为阻抗比电桥和变压器电桥两大类。习惯上一般称阻抗比电
桥为交流电桥。本实验中交流电桥指的是阻抗比电桥。交流电桥的线路虽然和直流 单电桥线路具有同样的结构形式，但因为它的四个臂是阻抗，所以它的平衡条件、 线路的组成以及实现平衡的调整过程都比直流电桥复杂。