首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Allergy has become more and more common over the last 30 years. It is a reaction that occurs when the immune system has a strang
Allergy has become more and more common over the last 30 years. It is a reaction that occurs when the immune system has a strang
admin
2019-09-01
26
问题
Allergy has become more and more common over the last 30 years. It is a reaction that occurs when the immune system has a strange and unnecessary reaction to a substance which is normally harmless, such as pollen (花粉)or peanuts. The immune system is there to protect the body against outside attackers, including viruses, bacteria and parasites. To defend your body against an attacker, the immune system remembers these dangerous micro-organisms and attacks them if it meets them again. This work is done by antibodies. The immune system in allergy sufferers makes antibodies against harmless substances, because it mistakenly believes them to be dangerous.
【B1】______ Sometimes people can eat nuts for years and then suddenly become allergic to them. What has happened is that the immune system has now decided the substance is dangerous and has made an allergy antibody. This antibody then attaches itself to cells, which contain histamine (组织胺). When the antibodies meet the allergen the next time, they attempt to destroy it. As they do that, the surface of the cells is broken, and histamine is released. The histamine and other chemicals inflame the tissues. This leads to the symptoms of allergy, such as swelling, rashes, sneezing and breathlessness.
【B2】______Some people are bom with the ability to make lots of allergy antibodies, and they are more likely to develop allergies and allergic disorders such as hay fever and asthma.
【B3】______ We eat more processed foods, with a wide range of additives and colourings; more and more people have central heating and double glazing, making our houses warmer and less draughty.
【B4】______At one time our immune systems were kept busy fighting off disease and trying to win the battle for health, but, antibiotics have reduced the amount of work our immune systems have to do. Now experts think they may direct spare energy to harmless substances. In other words, our immune systems have become oversensitive.
【B5】______ Sufferers may be given medicine to control symptoms, and they may also be offered tests to find out what substances trigger an allergic reaction so that they can avoid contact with these substances in future.
Questions 61-65
Complete the passage with the following sentences. There are two extra sentences that you do not need to use.
A. There may also be a link between allergies and antibiotics.
B. Allergies run in families.
C. A good deal of research is being devoted to finding a cure for allergies.
D. One-third of us are affected by allergy at some point in our lives.
E. Experts believe more people have developed allergies because of changes in our lifestyle which have exposed us to more allergens.
F. In the UK, five per cent of children suffer from food allergy.
G. An allergic reaction may not happen the first time a sufferer meets an allergen.
【B2】
选项
答案
B
解析
该空后面提到“有些人天生就有能力产生大量的过敏抗体,而且他们更有可能患上过敏和过敏性疾病,如花粉症和哮喘”。由此可知,该空应该与过敏是遗传性疾病有关,符合条件的只有B项(过敏是家族遗传的。)
转载请注明原文地址:https://jikaoti.com/ti/GuWMFFFM
本试题收录于:
D类竞赛(专科)题库大学生英语竞赛(NECCS)分类
0
D类竞赛(专科)
大学生英语竞赛(NECCS)
相关试题推荐
A.equipmentB.maintainC.forexampleD.contactE.contrastF.gainedG.natural
A.equipmentB.maintainC.forexampleD.contactE.contrastF.gainedG.natural
Iamoneofthemanycitypeoplewhoarealwayssayingthatgiventhechoicewewouldprefertoliveinthecountryawayfromth
(1)Menandwomenapproachproblemswithsimilargoalsbutwithdifferentconsiderations.Whilemenandwomencansolveproblems
ReadingontheInternetThe【T1】________ofreadingandtechnologyontheInternet.newformsofliteracy—requiring
Sharonwassupposedtobehereat10o’clock.She________aboutourmeeting.
HurricanesWarmwaterandmoist,warmairaretwomainfactorsthatareresponsibleforcausinghurricanestorms.Hurricanes
Thesecretofthesuccessfulhandshakeisnosecretanymore.ManagementconsultantRobertE.Brownexplainswhatshakinghandsi
Ifthemanager______thefilesmorecarefully,hewouldhaveknownthatwe______anenormousefforttocompletetheproject.
To;Roberts.hifi.co.ukFrom;Dave@electricalsupplies.comWearesorrythatourcomputerorderingsystembroke【16】______la
随机试题
如果文档很长,那么用户可以用Word2010提供的()功能,同时在两个窗口中查看同一文档的不同部分。
葡萄糖顺浓度梯度进入一般细胞属于静息状态下K+由细胞内向膜外扩散属于
具有催化活性的RNA分子被称为
A.寒B.热C.风D.气E.脓
早期妊娠的确诊依据是()。
下列关于测绘员野外住宿的说法中,正确的是()。
《城市区域环境振动标准》适用于发生的()、冲击振动和()。
1982年电影《少林寺》的1角钱票价与2012年的《地心历险记2》的120元票价对比,电影票价30年涨了1200倍。据调查显示,有92%的认为票价过高。市民李某每年去电影院看电影5次,他认为:电影票价水平与收入水平相差较远.只能偶尔享受一下“贵族消费”。
影子银行
下列矩阵中属于正定矩阵的是
最新回复
(
0
)