友情提示：如果本网页打开太慢或显示不完整，请尝试鼠标右键“刷新”本网页！
40天攻克大学英语四级-第48部分
快捷操作: 按键盘上方向键 ← 或 → 可快速上下翻页 按键盘上的 Enter 键可回到本书目录页 按键盘上方向键 ↑ 可回到本页顶部! 如果本书没有阅读完，想下次继续接着阅读，可使用上方 "收藏到我的浏览器" 功能 和 "加入书签" 功能！
ge。
Radiation is the greatest known danger to explorers in space。 The unit of radiation is called “rem”。 Scientists have reason to think that a man can put up with far more radiation than 0。1 rem without being damaged； the figure of 60 rems has been agreed on。 The trouble is that it is extremely difficult to be sure about radiation damage — a person may feel perfectly well； but the cells of his or her sex organs may be damaged； and this will no be discovered until the birth of deformed children or even grandchildren。
Missions of the Apollo flights have had to cross belts of high amount of rems。 So far； no dangerous amounts of radiation have been reported； but the Apollo missions have been quite short。 We simply do not know yet how men are going to get on when they spend weeks and months outside the protection of the atmosphere； working in a space laboratory。 Drugs might help to decrease the damage done by radiation； but no really effective ones have been found so far。
31。 Acomording to the first paragraph； the atmosphere is essential to man in that _______。
A） it protects him against the harmful rays from space
B） it provides sufficient light for plant growth
C） it supplies the heat necessary for human survival
D） it screens off the falling meteors
32。 We know from the passage that _______。
A） exposure to even tiny amounts of radiation is fatal
B） the effect of exposure to radiation is slow in coming
C） radiation is avoidable in space exploration
D） astronauts in spacesuits needn’t worry about radiation damage
33。 The harm radiation has done to the Apollo crew members _______。
A） is significant B） seems overestimated
C） is enormous D） remains unknown
34。 It can be inferred from the passage that _______。
A） the Apollo mission was very sucomessful
B） protection from space radiation is no easy job
C） astronauts will have deformed children or grandchildren
D） radiation is not a threat to well…protected space explorers
35。 The best title for this passage would be _______。
A） The Atmosphere and Our Environment
B） Research on Radiation
C） Effects of Space Radiation
D） Importance of Protection Against Radiation
Passage Four
Questions 36 to 40 are based on the following passage。
It has been thought and said that Africans are born with musical talent。 Because music is so important in the lives of many Africans and because so much music is performed in Africa； we are inclined to think that all Africans are musicians。
The impression is strengthened when we look at ourselves and find that we have become largely a society of musical spectators（旁观）。 Music is important to us； but most of us can be considered consumers rather than producers of music。 We have records； television； concerts； and radio to fulfill many of our musical needs。
In most situations where music is performed in our culture it is not difficult to distinguish the audience from the performers； but such is often not the case in Africa。 Alban Ayipaga； a Kasena semiprofessional musician from northern Ghana； says that when his flute（长笛）and drum ensemble（歌舞团）is performing。 “Anybody can take part”。 This is true； but Kasena musicians recognize that not all people are equally capable of taking part in the music。 Some can sing along with the drummers； but relatively few can drum and even fewer can play the flute along with the ensemble。 It is fairly common in Africa for there to be an ensemble of expert musicians surrounded by others who join in by clapping； singing； or somehow adding to the totality of musical sound。 Performing nucleus and the additional performers； active spectators； and passive spectators may be difficult to draw from our point of view。
36。 The difference between us and Africans； as far as music is concerned； is that _______
A） most of us are consumers while most of them are producers of music
B） we are musical performers and they are semiprofessional musicians
C） most of us are passive spectators while they are active spectators
D） we are the audience and they are the additional performers
37。 The word “such” （Para。 3； Line 2） refers to the fact that _______
A） music is perforated with the participation of the audience
B） music is performed without the participation of the audience
C） people tend to distinguish the audience from the performers
D） people have records； television sets and radio to fulfill their musical needs
38。 The author of the passage implies that _______
A） all Africans are musical and therefore much music is performed in Africa
B） nor all Africans are born with musical talent although music is important in their lives
C） most Africans are capable of joining in the by playing musical instruments
D） most Africans perform as well as professional musicians
39。 The word “nucleus” （Para。 3； Line 9） probably refers to _______
A） musicians famous in Africa
B） musicians at the outer circle。
C） musicians acting as the core in a performance
D） active participants in a musical performance
40。 The best title for this passage would be _______
A） The Importance of Music to African People
B） Differences Between African Music and Music of Other Countries
C） The Relationship between Musicians and Their Audience
D） A Characteristic Feature of African Musical Performances
Part III Vocabulary （20 minutes）
Directions： There are 30 incomplete sentences in this part。 For each sentence there are four choices marked A）； B）； C） and D）。 Choose the ONE answer that best completes the sentence。 Then mark the corresponding letter on the Answer Sheet with a single line through the centre。
41。 While studying at U。C。L。A。； Mr。Wang _______ his old friend； whom he has not seen for nearly twenty years。
A） encountered B） whispered C） swung D） maid
42。 The _______ production of engines in our factory has doubled this year。
A） manual B） annual C） mass D） muss
43。 The Foreign Minister made an excellent_______on the current international situation。 A） committee B） command C） comment D） commission
44。 Her father will never _______ of her going to study in the United States alone。
A） prove B） agree C） admit D） approve
45。 If there is no other way to save a _______ person in a tall building on fire； fire fighters may spread a net into which the person can jump。
A） abandon B） wrapped C） trapped D） deserted
46。 Since 1978； many new _______ have been developed in our university to meet the increasing demands of the students。
A） disciplines B） entrances C） discriminances D） principles
47。 The question then ________： What are we going to do when we graduate from the university？
A） raises B） arouses C） arises D） rises
48。 His speech _______ the young people to continue their study。
A） urged B） stimulated C） inspired D） promoted
49。 The rebuilding plan was _______ to the committee。
A） transmit B） admitted C） transfer D） submitted
50。 John’s score on the test is the highest in the class； he____ last night。
A） should study B） should have studied
C） must have studied D） must have to study
51。 Jack is _______ of stealing the books from the library。
A） acomused B） witnessed C） charged D） found
52。 The manager promised to have _______ my complaint。
A） looked through B） looked over C） looked into D） looked after
53。 Metals expand when they are heated and _______ when cooled。
A） minimize B） freeze C） shrink D） contract
54。 In order to _______ a good knowledge of English； he gave up his job and went to study in an English school。
A） require B） inquire C） acquire D） address
55。 He checked carefully to _______ the possible errors in his design。
A） eliminate B） exceed C） enlarge D） erase
56。 This mountain range has many high _______ and fertile valleys。
A） peaks B） tops C） highlights D） climaxes
57。 He gave us a good _______ of his experience。
A） demonstration B） frequency C） descripton D） instruction
58。 Richard doesn’t think he could ever ______ what is called “free style” poetry。
A） take on B） take over C） take to D） take after
59。 This sick man was _______ in a blanket。
A） input B） issued C） ensured D） wrapped
快捷操作: 按键盘上方向键 ← 或 → 可快速上下翻页 按键盘上的 Enter 键可回到本书目录页 按键盘上方向键 ↑ 可回到本页顶部!
温馨提示： 温看小说的同时发表评论，说出自己的看法和其它小伙伴们分享也不错哦！发表书评还可以获得积分和经验奖励，认真写原创书评 被采纳为精评可以获得大量金币、积分和经验奖励哦！