6．Nuclear power's danger to health，safety，and even life itself can be summed up in one word：radiation．
Nuclear radiation has a certain mystery about it，partly because it cannot be detected by human senses．It can't be seen or heard，or touched or tasted，even though it may be all around us．There are other things like that．For example，radio waves are all around us but we can't detect them，sense them，without a radio receiver．Similarly，we can't sense radioactivity without a radiation detector．But unlike common radio waves，nuclear radiation is not harmless to human beings and other living things．
At very high levels，radiation can kill an animal or human being immediately by killing masses of cells in vital organs．But even the lowest levels can do serious damage．There is no level of radiation that is completely safe．If the radiation does not hit anything important，the damage may not be serious．This is the case when only a few cells are hit，and if they are killed immediately，your body will replace the dead cells with healthy ones．But if the few cells are only damaged，and if they reproduce themselves，you may be in trouble．They can grow into cancer．Sometimes this does not show up for many years．
This is another reason for some of the mystery about nuclear radiation．Serious damage can be done without the victim being aware at the time that damage has occurred．A person can be irradiated（輻射 ）and feel fine．then die for cancer five，ten，or twenty years later as a result．Or a child can be born weak as a result of radiation absorbed by its grandparents．
Radiation can hurt us．We must know the truth．

51．What is the most dangerous factor of nuclear power？C
A．Amount       B．Quantity         C．Radiation         D．Place
52．Which of the following statements is TRUE？B
A．Nuclear radiation can do little harm to human beings．
B．Nuclear radiation can do harm to human beings．
C．Nuclear radiation can be detected by human senses．
D．Nuclear radiation is just like common radio waves．
53．How can nuclear radiation kill an animal？D
A．By damaging its heart．
B．By killing a few cells in its body．
C．By hitting any place in its body．
D．By killing many cells in important organs．
54．Nuclear radiation has a certain mystery becauseA．
A．it can do harm to a person while the victim doesn't know
B．human beings learn its harmfulness
C．nuclear radiation can kill a person very easily
D．human beings have no effective machine to detect nuclear radiation
55．If a human being is hit by nuclear radiation，he mayD．
A．die of cancer after many years
B．die immediately
C．have a child who may be born weak
D．a(chǎn)ll of the above．

分析 本文主要向我們介紹了核能對(duì)我們健康的危害．核能對(duì)人類的健康、安全乃至生命所造成的危害可用一個(gè)單詞加以概括：輻射．核輻射無(wú)法被人類的感官所感知，它會(huì)傷害一個(gè)人而受害者不知道．如果一個(gè)人遭受了核輻射，他可能在若干年后死于癌癥，又或者是生了一個(gè)天生弱的孩子，更嚴(yán)重的是可能會(huì)立即死亡．

解答 51．C 細(xì)節(jié)理解題．由第一段Nuclear power's danger to health，safety，and even life itself can be summed up in one word：radiation．可知核電最危險(xiǎn)的因素是輻射．故選C．
52．B 細(xì)節(jié)理解題．由第二段可知核輻射不同于普通的無(wú)線電波，它無(wú)法被人類的感官所感知，它對(duì)人類和其他生物是有害的．故選B．
53．D 推理判斷題．由第三段At very high levels，radiation can kill an animal or human being immediately by killing masses of cells in vital organs．可知輻射通過(guò)殺滅重要器官的大量細(xì)胞來(lái)殺害動(dòng)物或人類．故選D．
54．A 細(xì)節(jié)理解題．由第四段This is another reason for some of the mystery about nuclear radiation．Serious damage can be done without the victim being aware at the time that damage has occurred．A person can be irradiated（輻射 ）and feel fine．可知核輻射無(wú)法被人類的感官所感知，它會(huì)傷害一個(gè)人而受害者不知道．故選A．
55．D 細(xì)節(jié)理解題．由第四段then die for cancer five，ten，or twenty years later as a result．Or a child can be born weak as a result of radiation absorbed by its grandparents．可知如果一個(gè)人遭受了核輻射，他可能在若干年后死于癌癥，又或者是生了一個(gè)天生弱的孩子；由第三段At very high levels，radiation can kill an animal or human being immediately by killing masses of cells in vital organs．可知一個(gè)人遭受了核輻射可能立即死亡．由此可知A、B、C項(xiàng)敘述都是對(duì)的．故選D．

點(diǎn)評(píng) 本文考察學(xué)生的理解推斷能力以及細(xì)心程度，只要抓住文章的關(guān)鍵詞，采用尋讀的方法查找細(xì)節(jié)，就能找到正確答案．

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科目：高中英語(yǔ) 來(lái)源： 題型：閱讀理解

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63．There is less research on overweight and cognitive functions because researchersC
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B．have focused on ways to sharpen people's mind
C．do not consider overweight a main cause for low cognitive ability
D．a(chǎn)re clear about the relation between weight and mental functions
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科目：高中英語(yǔ) 來(lái)源： 題型：閱讀理解

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Later，news of polluted underground water in some provinces scared people who wondered whether the water they drink is safe．
So the need to emphasize environmental protection while developing the economy is heard everywhere．
Smog especially is a common concern．Like a popular online post said，air may be the only thing that is equal for everyone，despite your income or vocation．People with higher incomes are able to drink only bottled spring water and eat only organic food by paying higher prices，but they breathe the same air as everyone else．
At a meeting on Monday，many Representatives have expressed their concerns about the air quality，too．One talked about his experience in Beijing．"After taking a taxi from the capital airport to my hotel，which took about an hour，I washed my nose and found the inside of my nose was black．We should ask ourselves this question：Why do we want to develop？It's for living a better life．Dirty air is definitely not a better life，"he said．
China needs to develop its economy and invest（投資） in high-tech．Every Chinese wants a strong country．But without blue sky，clean water and safe food，the achievements in the economy will become meaningless．Space technologies are not to be developed for building a base on Mars so that one day all human beings can migrate to the red planet because they have destroyed Earth．
What the public wants is a strong and beautiful China．President Hu Jintao spoke at the 18th Party Congress last November saying that great efforts must be made to promote ecological progress and build a beautiful China．The words have shown the central government's resolution to address the environment issue．

41．The effect of smog doesn't includeC．
A．the rising of PM 2.5readings
B．more people suffering diseases
C．the increase of people's income
D．patients increased in hospital
42．Why smog has become a common concern？B
A．Because people have to pay higher prices．
B．Because nobody can avoid it．
C．Because we have to develop industry．
D．Because a popular online-post discussed it．
43．To make China stronger we have to develop economy，butB．
A．we have to sacrifice air as the price 
B．the dirty air is not what we want
C．ecological progress can be ignored
D．the smog is the only byproduct
44．The underlined word"they"in paragraph 6refers toA．
A．human beings
B．other plants
C．space technologies
D．industrial development
45．From the last two paragraphs we can infer thatD．
A．high-tech can completely solve the problem of pollution
B．space technologies should be developed in a large scale
C．we can move to the Mars after the earth has been destroyed
D．we must protect the environment while developing economy．

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