Question

20．Lead poisoning （铅中毒）occurs when lead is present in high levels in the blood of a person．It is one of the most common medical problems found in children．And it's important to recognize the presence of lead in children's bodies because lead is very harmful．
Children have the tendency to go around and put things in their mouths like paint peelings．This is one of the main causes of lead poisoning．It has also been found that children born in poor families have higher chances of getting exposed to lead．
Some of the common symptoms of lead poisoning in children are headaches，stomach pains，hair loss，muscle weakness，and weight loss，etc．
Lead poisoning can have severe effects and can lead to heart diseases，kidney diseases and neurological（神经系统的）problems．It can also result in mental dullness and a low I．Q．level．There have been cases where lead poisoning proved to be terminal for children．
It's difficult to easily recognize whether a child is affected by lead poisoning，as the symptoms of this disease can occur due to some other medical problems．Therefore，children under the age of 6should regularly be checked to know the level of lead in their blood through blood tests．It's possible to completely cure a child with lead poisoning through treatment．Usually the oral medicine chelator（螯合剂）is given to the children．Sometimes，children are given an injection（注射）for reducing the lead level．Children who have very high level of lead in their blood would need treatment for a long period of time and would also be put on a special diet．
Parents have to take certain precautions to lower the chance of lead poisoning in children．Cleaning the house regularly and removing shoes at the door after coming in form outside will prevent the lead particles from entering the house．Children should be put on a healthy diet，containing high proportions（比例）of calcium and iron，such as eggs，milk，fruits，potatoes，etc．
Which helps to keep the lead levels in control，in the children's bodies．
In short，it's a must to be cautious and careful，and protect your children from the horrible consequences of lead poisoning．

Lead Poisoning in Children（71）Causes． •Children's going around and putting things in their mouths． •High chances of（72）bloodlead． （73）Symptoms •Headaches，stomach pains，hair loss，muscle weakness，and weight loss，etc． Effects•Lead to heart diseases，kidney diseases and neurological problems． •（74）Effectsmental dullness and a low I．Q．level． Treatment•Make children take the chelator or（75）receive/getan injection to reduce the lead level． •Put children with a very high lead level on （76）a special diet （77）Suggestions/Preventions •（78）Cleaning the houseregularly and remove shoes at the door after coming in from the outside． •Let children eat healthy food which contain（79）highof calcium and iron． （80）protect your children •You must be cautious and careful to protect your children from lead poisoning．

Answer 1

分析 铅中毒是儿童中常见的疾病，辨别儿童体内铅的含量十分重要．本文讲述了铅中毒对儿童的危害，呼吁家长要谨慎，保护孩子免受铅的危害．

解答 71．Causes                      72．blood                  73．Symptoms                 74．Effects              75．heart diseases             76．a special diet               77．Prevention/suggestion   78．Cleaning the house     79．high                    80．protect your children
71．（Main） Causes/Reasons 考查信息查找能力．该空缺处是小标题，首字母要大写；根据第二段的"This is one of the main causes of lead poisoning．"可知该段讲述的是导致儿童铅中毒的原因，故填（Main） Causes/Reasons．
72．blood 考查信息的定位能力．由第五段children under the age of 6should regularly be checked to know the level of lead in their blood through blood tests，6岁以下的儿童应定期检查血液知道血铅水平．可知铅中毒使血铅水平提高．故填blood．
73．Symptoms 考查归纳概括能力．该空缺处是小标题，首字母要大写；根据第四段的"Lead poisoning can have severe effects and can lead to heart diseases，kidney diseases and neurological （神经系统的） problems．"可知该段讲述的是铅中毒对人体的影响，归纳概括为Symptoms，症状，故填Symptoms．
74．Effects 考查同义词的转换．第四段的"It can also cause mental dullness and a low IQ level．"它也会导致精神低沉和低情商．表明该空缺处要填cause的同义词Effects，故填Effects．
75．receive/get 考查信息的定位能力．分析句子结构可知空缺处作children的补足语，在动词make后，要用动词原形；根据第五段的"Sometimes，children are given an injection （注射） for reducing the lead level．"可知该处要用动词get或receive代替本句中的are given，故填receive/get．
76．a special diet 考查信息定位能力．根据第五的段"Children who have very high level of lead in their blood would need treatment for a long period of time and would also be put on a special diet．"可知该处的答案，故填a special diet．
77．Conclusion/Summary 考查归纳概括能力．该空缺处是小标题，首字母要大写；最后一段的"In short，"表明这是对文章内容的总结，用conclusion或summary表示，故填Conclusion/Summary．
78．Cleaning the house．考查信息的定位能力．由倒数第二段原句Cleaning the house regularly，定期打扫房间，可知此处填Cleaning the house．
79．high proportions  考查信息的定位能力．由最后一段containing high proportions（比例）of calcium and iron，包含高钙和高铁的食物，可知此处填high proportions．         
80．protect your children 考查信息的定位能力．最后一段的"protect your children from the horrible consequences of lead poisoning"表明了该处的答案为protect your children，故填protect your children．

点评 本篇阅读较为简单．除了总结性的概括之外，许多空都在原文中句子有照应，直接填出所缺即可．考生可以抓住关键词跳读作答．