高考英语专题训练系列 42 阅读理解阅读填空七选五说明文Word文档格式.docx

1、选项中有两项为多余选项。What is Particulate Matter?There are things floating around in the air. Most of them, you cannot even see. They are a kind of air pollution called particles or particulate matter. In fact, particulate matter may be the air pollutant that most commonly affects peoples health.Have a Look.P

2、articles can come in almost any shape or size, and can be solid particles or liquid droplets. _1_ These groups differ in many ways. One of the differences is size, we call the bigger particles PM 10 and we call the smaller particles PM 2.5.BIG.The big particles are between 2.5 and 10 micrometers （fr

3、om about 25 to 100 times thinner than a human hair）. These particles are called PM 10 （we say “PM ten”, which stands for Particulate Matter up to 10 micrometers in size）. _2_SMALL.The small particles are smaller than 2.5 micrometers （100 times thinner than a human hair）. _3_ We say “PM two point fiv

4、e”, as in Particulate Matter up to 2.5 micrometers in size.The smaller particles are lighter and they stay in the air longer and travel farther. PM 10 （big） particles can stay in the air for minutes or hours while PM 2.5 （small） particles can stay in the air for days or weeks. And travel? _4_ PM 2.5

5、 particles go even farther; many hundreds of miles.Particulate Matter and Your Health.Both PM 10 （big） and PM 2.5 （small） particles can cause health problems, specifically respiratory （呼吸的） health. When you breathe, you take in the air along with any particles that are in the air, like heavy metals

6、and cancer causing organic compounds. _5_ Exposure to particulate matter leads to increased use of medication and more visits to the doctor or emergency room.A. Both visible and invisible air pollutants have great effects on our environment, our health, and the quality of our lives.B. PM 10 particle

7、s can travel as little as a hundred yards or as much as 30 miles.C. PM 2.5 can have worse health effects than the bigger PM 10.D. Air pollution is a growing problem in the whole world.E. These particles cause less severe health effects.F. We divide particles into two major groups.G. These particles

8、are called PM 2.5.助读词汇particle n. 微粒 pollutant n. 污染物droplet n. 小水珠；飞沫 micrometer n. 微米exposure n. 暴露 meditation n. 药物治疗particulate matter 悬浮颗粒物 organic compound 有机化合物emergency room 急诊室 heavy metal 重金属（二）Get Help When You Need ItSometimes even though you are paying attention in class, studying for t

9、ests, and doing your homework, certain classes seem too hard.What upsets many people is that they work harder and harder as they fall further and further behind. _1_ If you need extra help, the most important thing to know is that theres nothing embarrassing about it. No one is expected to understan

10、d everything, and people have very different learning styles._2_ He or she may be able to work with you before or after school and explain things more clearly.You might also be able to get some help from another student. If theres someone you like whos a good student, think about asking that person

11、if you can study together. This might help. _3_ Lots of people understand something perfectly without being able to explain it.Another option for extra help is a tutor, either after school, on weekends, or in the evening. Youll need to talk to an adult about this because it costs money to hire a tut

12、or. Tutors sometimes come to your home, but there are also tutoring centers across the country. A tutor may have broad knowledge of many things or may be trained in just one subject. _4_ The advantage of having a tutor is that it gives you the opportunity to ask questions directly and work at your o

13、wn pace.If youre interested in a tutor, check the internet or the yellow pages of your phone book, or get a referral from a teacher, a friend, or classmate who has a tutor. _5_ Often college students will tutor high school students in their areas of study to help cover the costs of school.A. Tutors

14、work with you one on one, helping review and further explain things taught in the classroom.B. And if you live in or near a town with a college or university, you may find tutors there.C. However, keep in mind that this might not get you the results you need.D. Naturally, this makes them hate a clas

15、s and everything to do with it.E. Good study techniques begin in the classroom as you take notes.F. The first place to turn for help is your teacher.G. Sometimes people put off studying.extra adj. 额外的 embarrassing adj. 令人尴尬的option n. 选择 tutor n. 家庭教师broad adj. 广泛的 referral n. 参照review v. 复习 fall behind 落后cover the cost 支付费用 one on one 一对一（三）How to Improve Your Conver