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1、? 北京天梯志鸿教育科技有限责任公司 课时规范练课时规范练 8(必修必修 2 Unit 3) .阅读理解 A (2018 吉林长春检测) Electronic books have changed the way many people read for pleasure.Now online textbooks are changing the way some students learn and some teachers teach. More than one hundred and seventy-five thousand students attend the public s
2、chools in Fairfax County,Virginia,outside Washington.Last year,the school system used digital(数字的) books in fifteen schools.This school year,middle schools and high schools changed from printed to electronic textbooks in their social studies classes. Luke Rosa is a history teacher at Falls Church Hi
3、gh School.His students work on laptop computers at school.He explains the idea to them this way,“I mean,its just like a regular textbook,except its got it all,online.” Peter Noonan,an assistant superintendent(助理监督) of schools,said,“The worlds changing.And the online textbooks can change right along
4、with the events that are happening.” Digital books also cost less than printed textbooks,he said. A student named Melanie Reuter said,“I dont have to carry a textbook around,so thats nice.” But another student said,“I dont like it because the Internet sometimes doesnt work.” Students also need acces
5、s to the Internet when they are not at school.About ten percent of students in Fairfax County do not have a computer or online access at home.Public libraries in the county have free Internet.There are also after-school computer labs as well as computer clubhouses supported by the county.Middle scho
6、ol student Slieman Hakim is happy about that.He said,“My family only has one computer;my sister and I both do our homework on it.So I come here to do my homework.Its good.” 2 Other school systems in the area are also considering online textbooks. 1.Which of the following is NOT used when students ha
7、ve social studies classes? A.Computers. B.The Internet. C.Paper textbooks. D.Electronic textbooks. 2.One of the disadvantages of digital textbooks is that . A.theyre more expensive B.they cant be used if the computer is offline C.theyre soon out of date D.reading online does harm to students eyes 3.
8、Why does Slieman Hakim feel happy? A.He is offered a free computer to do his homework. B.He doesnt have to do his homework at home. C.He has access to the Internet to study at any place. D.He neednt share a computer with his sister to do homework. 4.What can we learn from the passage? A.All students
9、 like digital textbooks because they are new. B.Digital textbooks are more beautiful than paper textbooks. C.Students can do their homework in the computer clubhouses. D.The lessons online are completely different from those in paper textbooks. 导学号 23280038 B (2018 陕西西安中学期中检测) 3 The Internet plays a
10、 big part in human life.We use it for work and entertainment.We can find new recipes on the Internet or advice on staying healthy.We can even use it to learn a new language.We use the Internet to keep in contact with family and friends and stay in touch with issues we care about.The list goes on and
11、 on.So,there may be no going back to an Internet-free life.But can using the Internet too much be bad for our health?It might be,say researchers.A new study finds that heavy Internet use may be connected to high blood pressure in an unlikely groupteenagers.So,try to be a responsible guardian(监护人). T
12、he study results show that teens who spend at least 14 hours a week online were more likely to have high blood pressure.High blood pressure makes your heart and blood vessels work too hard.Over time,this extra strain increases your risk of a heart attack or stroke.High blood pressure can also cause
13、heart and kidney disease.It is also closely linked to some form of dementia(痴 呆),or a brain disease. The Henry Ford Hospital in Detroit,Michigan did the study.It involved 335 young people,from 14 to 17 years old.One hundred and thirty-four of the teens were described as “heavy Internet users”.Resear
14、chers found that out of these 134 teens,26 had high blood pressure.The researchers say the study is the first one to connect heavy web use with high blood pressure.Other research has connected that heavy Internet use with health problems including anxiety,depression and obesity. The lead researcher
15、of the study is Andrea Cassidy-Bushrow.For the purpose of the study,she explains,teens considered heavy Internet users were online on average 25 hours a week.It is important for teens to take regular breaks from their computers or smartphones and to do some kind of physical activity.She also suggest
16、s that parents limit their childrens use of the Internet to two hours a day,five days a week. The Centers for Disease Control and Prevention(CDC) says,70 million,or 29%,of American adults have high blood pressure.The CDC estimates that high blood pressure costs the United States $46 billion each year. 4 5.The author mainly wants to tell us . A.how to prevent high blood pressure B.too much Internet use may be bad for teenagers C.its necessary for teenagers to avoid the I
