北师大高中英语选修七同步作业：nit Hman Biology课后限时作业 含答案

课后限时作业(九)[语言知识练]Ⅰ.单句语法填空1．The house __was sought__(seek) through but nothing suspicious was found.2．The mother had the baby __crying__(cry) all the morning.3．I swapped my red scarf __for__ her blue one.4．The librarian took a book __at__ random from the shelf.5．The thief broke in，trying to open the safe，but __in__ vain.6．The citizens opposed __building__(build) such a factory in this area.7．I've just come __across__ a beautiful poem in this book.8．Good health is __fundamental__(fundament) if you want to have a long life.9．You needn't worry—he will make __it__.10．Perhaps you should be more tolerant __of__ your little sister.Ⅱ.课文语法填空Athletic performances have 1.__continually__(continue) improved since the first Olympic Games.However，improvements 2.__have begun__(begin) to slow down recently.While 3.__talking__(talk) about breaking records，we come across the issue of performance－enhancing drugs，4.__which__ are originally developed to help people with illnesses，but they are often used by some athletes to perform 5.__better__(well) than usual.6.__In__ other words，doping is a fundamental form of cheating.Unfortunately，it is difficult to catch athletes 7.__using__(use) illegal drugs.The winners have to be tested 8.__while__ other participants are only tested 9.__at__ random.New drugs are developed all the time and drug tests for sporting events are often one step behind.In the future another issue is gene－therapy.Athletes who have their genes 10.__changed__(change) might perform much better in the match.In today's world，if doping and gene－therapy continue to affect the outcomes of major sporting events，the Olympic spirit will have lost its meaning.[高考题型练]Ⅲ.阅读理解A drug used to treat severe bleeding could save thousands of lives for mothers giving birth.A global trial of the drug found it reduced the risk of bleeding deaths during childbirth by nearly one －third.The study involved 20,000 women in 21 countries, mainly in Africa and Asia.The trial was carried out by London's School of Hygiene and Tropical Medicine.The drug is called tranexamic acid (氨甲环酸)．It is low－cost and researchers said it does not cause serious side effects for mothers or babies.The drug is used to treat mothers for severe bleeding during childbirth, also known as postpartum hemorrhage (产后出血)．It is the leading cause of mothers' death worldwide,according to the World Health Organization.Haleema Shakur is the project director of the trial.She says despite medical advances in many countries, severe bleeding after childbirth remains a big problem in some parts of the world.“It's one of the biggest killers of mothers.In Africa and Asia, about 10 percent of women will end up with severe bleeding.” The drug works by stopping blood clots (血凝块) from breaking down after a mother gives birth.The treatment can prevent the need for doctors to perform surgery to find the source of bleeding.Shakur said the best results were reported when the drug was given to women as soon as possible after childbirth.“The earlier you give it—so within the first three hours of giving birth—the better the effect will be.”The next step will be to get the drug where it is needed and provide training for doctors and nurses on how to use it.During the trial, women were given the drug in a hospital.But researchers are looking for easier ways to administer the drug so it can be more widely used in small clinics and rural areas.语篇导读本文为说明文，介绍了一种能够大大降低产妇产后出血死亡几率的药品——氨甲环酸。

1．What do we know about tranexamic acid from the text?A．It should be used for every mother.B．It helps mothers before giving birth.C．It ensures most new－born babies' health.D．It can help mothers giving birth stop bleeding.解析D细节理解题。

根据第一段内容和第二段第一句可知，tranexamic acid(氨甲环酸)是一种治疗产后出血的药品，故选D项。

2．What is the researchers' next plan?A．To know how much the drug is.B．To get permission to use the drug.C．To let more people know the drug.D．To make medical staff know how to use the drug.解析D细节理解题。

根据最后一段第一句可知，下一步需要做的是让医疗工作者熟知这种药的使用方法，故选D项。

3．What can we learn from the passage?A．The more mothers use the drug, the better its effect will be.B．African and Asian countries made great progress in medicine.C．There is a long way to go before the drug can be used more widely.D．Postpartum hemorrhage is the leading cause of women's death.解析C推理判断题。

根据最后一段最后一句可知，距离这种药品的广泛使用的过程还很漫长，还有许多工作要做，故选C项。

4．What may be the best title for the passage?A．Care for the Health of MothersB．How Can We Use Tranexamic Acid Well?C．Childbirth Drug Greatly Reduces Bleeding DeathsD．What's the Biggest Killer of Mothers?解析C标题归纳题。