首页
登录
职称英语
[img]2019m9x/ct_eyyjsdz2019j_eyyjsdreadb_0172_201909[/img] Allergy has become
[img]2019m9x/ct_eyyjsdz2019j_eyyjsdreadb_0172_201909[/img] Allergy has become
游客
2024-08-20
44
管理
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. [br] 【B4】
选项
答案
A
解析
该空后面提到“我们的免疫系统曾度忙于战胜疾病,试图赢得健康之战,但抗生素已经减少了免疫系统必须做的工作”。由此可知,该空应该与抗生素可能导致过敏有关,符合条件的只有A项(过敏和抗生素之间可能也有联系。)
转载请注明原文地址:https://tihaiku.com/zcyy/3727408.html
相关试题推荐
[img]2019m9x/ct_eyyjsdz2019j_eyyjsdreadd_0184_201909[/img]Manypeoplecompla
[img]2019m9x/ct_eyyjsdz2019j_eyyjsdreadd_0184_201909[/img]Manypeoplecompla
[img]2019m9x/ct_eyyjsdz2019j_eyyjsdreadd_0184_201909[/img]Manypeoplecompla
[img]2019m9x/ct_eyyjsdz2019j_eyyjsdreadc_0178_201909[/img]In2004,aHarvard
[img]2019m9x/ct_eyyjsdz2019j_eyyjsdreadb_0172_201909[/img]Allergyhasbecome
[img]2019m9x/ct_eyyjsdz2019j_eyyjsdreadb_0172_201909[/img]Allergyhasbecome
[img]2019m9x/ct_eyyjsdz2019j_eyyjsdreadb_0172_201909[/img]Allergyhasbecome
[img]2019m9x/ct_eyyjsdz2019j_eyyjsdreadb_0172_201909[/img]Allergyhasbecome
[img]2019m9x/ct_eyyjsdz2019j_eyyjsdreadb_0172_201909[/img]Allergyhasbecome
Whichcircleshouldreplacethequestionmark?[img]2019m9x/ct_eyyjsdz2019c_eyyj
随机试题
Indiansalwaysshake(摇)theirheadstheytalktoothers.【C1】______doesnotha
【B1】[br]【B14】A、simpleB、justC、mereD、onlyDsimply和mere,only都有“只不过”的意思。simply不
[originaltext]M:Morning,Brenda.W:Goodmorning,Mr.Browning.M:Er,didyou
房地产市场外部环境主要调查的内容有()。A.建筑设计、质量 B.房地产行业
下列关于房地产执业规范与法律法规的说法,不正确的是( )。A.就房地产经纪机构
对心绞痛发作处理不正确的是A.立即停止活动卧床休息 B.给予氧气吸入,维持血氧
教育要遵循个体身心发展的规律。《学记》中“当其可之谓时,时过然后学则勤苦而难成”
甲县公安局刑警大队XX中队在办理一起盗窃案件时,认为需要对犯罪嫌疑人提请逮捕,根
下列哪种行为属于有效的民事法律行为?()A.六岁的小薛将价值500的玩具车送给
男,42岁。2年前缺失,行固定义齿修复。现基牙松动。基牙松动的原因最可能是(
最新回复
(
0
)