Infrared thermometers（红外温度计）, or temperature ...

Infrared thermometers（红外温度计）, or temperature guns, have been widely used to detect（检测）the early symptoms of COVID-19. They allow us to measure（测量）temperatures quickly. How do these thermometers work?

They determine temperature by measuring the energy coming from your skin （皮肤）. Everything in nature has molecules （分子） inside of it that are always moving around. This include our skin. The higher the temperature is, the faster the molecules move. The molecules give off infrared light while moving.

This kind of light can be focused or absorbed（吸收）. The thermometers use a lens（镜头）to focus infrared light from the skin onto a detector called a thermopile（热电堆）. The thermopile absorbs the infrared radiation and turns it into heat. The electronic sensors inside the thermometers can measure the heat and read the temperature of the skin after making some calculations （计算）.

However, you might sometimes find that the results aren’t always accurate （准确的）. It depend on how these devices are used. For example, how far away they are held from the body, how steadily they are held and for how long. Factors such as make-up and sweat will also affect the results.

1.Temperature guns, have been widely used to detect （检测）the early symptoms of____________.

A.COVID-17. B.COVID-18. C.COVID-19. D.COVID-20.

2.They determine temperature by measuring the energy coming from your____________.

A.skin B.head C.face D.foot

3.The electronic sensors inside the thermometers can measure the heat and read the____________ of the skin.

A.color B.temperature C.light D.structure

4.Which one of the following might not affect the accurate results?

A.The thermometers is too far from the body.

B.The thermometers is held for very long.

C.Make-up and sweat.

D.The thermometer is held steadily at the right time.

九年级英语阅读单选中等难度题查看答案及解析

Neither you or he ______ Hawaii before.

九年级英语单项填空中等难度题查看答案及解析

People who have been to colleges may have written graduation papers or other kinds of papers during their four-year college life. It isn’t an easy thing for many college students, even teachers. However, a new study suggests that many of today’s college students have never experienced the challenge of writing very long papers. This may not be good news. Higher education can test a person’s academic（学业的） abilities in many ways. Most study programs require research, class discussions, and group projects. But that used to be one of the most important parts of higher education for years in the US. For example, if you asked almost any professor or student, they would likely tell you that writing was one of the skills most often examined at colleges and universities. College students should master（掌握） this skill, as it may be helpful for their work in the future.

The study includes data（数据） collected from 1,140 students at four-year colleges and universities in the US. The students were asked about the kinds of long-form writing they had done and the amount of writing training they had received. Nearly one third of them had never been required to write a paper or over.

James Moses is the president of Primary Research Group. He says ten pages or over might seem like an unnecessarily large amount of writing, especially for students in fields like Maths or science. In fact, he argues, many students avoid longer papers by choosing subjects in which they are less likely to be required.

Moses says students are likely to be attracted to those fields because many of today’s highest paying jobs are at big technology companies. But he says that many students fail to understand that there is still a great need for skilled writers in the job market. And long-form writing tasks do more than measuring how much a person can write about any given thing. They are helpful to students in many ways.

Dan Melzer, a writing teacher in University of California, agrees. He says long-form writing tasks can teach useful skills even in fields that may not seem to have to do with writing.

1.What does the new study mainly show?

A.Higher education can test many students’ abilities.

B.Long writing tasks are easier for college students.

C.Higher education pays too much attention to long papers.

D.Long writing tasks are less common at American colleges.

2.What does the underlined word “that” in Paragraph 1 refer to?

A.Writing long papers.

B.Completing group projects.

C.Testing students’ academic abilities.

D.Doing research for students’ programs.

3.According to Moses, how do many students avoid longer papers?

A.By writing several short ones to replace them.

B.By looking for jobs at big technology companies.

C.By choosing subjects not requiring them strictly.

D.By going to some universities of science and technology.

4.What’s Mose’s opinion on long-form writing tasks?

A.They are necessary for skilled writers.

B.They are still useful for college students.

C.They are not attractive in the technology field.

D.They are not helpful in Maths and science fields.

5.What would the text most probably talk about next?

A.Why long writing tasks are difficult.

B.How students can improve their writing skills.

C.How long writing tasks can test a student’s abilities.

D.Why long writing tasks are useful in certain fields.

九年级英语阅读单选中等难度题查看答案及解析

Have you ever been so worried about something that you have a headache or even can't sleep at night？Then you cannot pay enough attention during a test or in your study. If so，then you know that is stress. You are worried too much about something. The bad feeling in your mind can make you angry，sad or scared，and even can give you a stomachache or a headache.

However，some kind of stress is good. Excitement might happen when you are called to give a speech at school. You feel nervous but excited. This kind of stress can help you to get things well done. And you may do a better job in your test if the stress pushes you to prepare more beforehand.

On the other hand，bad stress can last long if you are unable to solve your problems. You may not feel well，if your parents are having a quarrel，if a family member is badly ill，if you're doing poorly at school，or if anything else makes you unhappy. This kind of stress isn't going to help you. And it can actually let you down in your daily life.

The best way to fight the stress is to have a balanced life. Make sure you get enough sleep and eat properly. Have some regular exercise. You should take some time for fun. Get advice from your parents，teachers and friends. Soon after that，you'll probably get away from your stress.

九年级英语填空困难题查看答案及解析

People have been trying to find out if homework is good or bad for school children， and they have different opinions.

Some people think that homework is an important part of learning for students.They believe it not only enables children to practice what they have learned in class， but also helps improve their handwriting.They also say that homework helps teach children how to work on their own.Also， it’s a skill which is useful to them in future life.

Others disagree， though.他们认为家庭作业给孩子们太多的压力.And the time spent on homework could have been used to do other activities like reading and playing sports.To back up their opinion， they give the example of Finland(芬兰).在芬兰， 学生几乎没什么作业.But the country remains one of the most educationally successful countries in the world.

Here is my point of view(观点) on this matter.Whether the homework is good or bad depends on the purpose of it.If there is no clear reason for giving homework， the students won’t get anything from doing it， so it should not be set.However， I still believe that homework can really help with children’s learning， if teachers clearly tell them why they should do the homework and let them know how they have done in their homework.

1.________________________________

2.________________________________

3.________________________________

4.________________________________

5.________________________________

九年级英语英汉互译：整句困难题查看答案及解析

任务型阅读

注意：每空一词。

Have you ever been so worried about something that you have a headache or even can’t sleep at night? Then you cannot pay enough attention during a test or in your study. If so, then you know that is stress. You are worried too much about something. The bad feeling in your mind can make you angry, sad, or scared, and can even give you a stomachache or a headache.

However, some kind of stress is good. Excitement might happen when you are called to give a speech at school. You feel nervous but excited. This kind of stress can help you to get things well done. And you may do a better job in your test if the stress pushes you to prepare more beforehand.

On the other hand, bad stress can last long if you are unable to come over your problems. You may not feel well, if your parents are having a quarrel, if a family member is badly ill, if you’re doing poorly at school, or if anything else makes you unhappy. That kind of stress isn’t going to help you. And it can actually let you do worse in your daily life. The best way to fight the stress is to have a balanced life. Make sure you get enough sleep and eat properly. Have some regular exercise. You should take some time for fun. Get advice from your parents, teachers and friends. Soon after that, you’ll probably get away with your stress.

九年级英语任务型阅读中等难度题查看答案及解析

任务型阅读

Have you ever been so worried about something that you have a headache or even can’t sleep at night? Then you cannot pay enough attention during a test or in your study. If so, then you know that is stress. You are worried too much about something. The bad feeling in your mind can make you angry, sad, or scared, and can even give you a stomachache or a headache.

However, some kind of stress is good. Excitement might happen when you are called to give a speech at school. You feel nervous but excited. This kind of stress can help you to get things well done. And you may do a better job in your test if the stress pushes you to prepare more beforehand.

On the other hand, bad stress can last long if you are unable to come over your problems. You may not feel well, if your parents are having a quarrel, if a family member is badly ill, if you’re doing poorly at school, or if anything else makes you unhappy. That kind of stress isn’t going to help you. And it can actually let you do worse in your daily life. The best way to fight the stress is to have a balanced life. Make sure you get enough sleep and eat properly. Have some regular exercise. You should take some time for fun. Get advice from your parents, teachers and friends. Soon after that, you’ll probably get away with your stress.

九年级英语任务型阅读中等难度题查看答案及解析

Recently, there have been many reasons to feel blue. By “blue,” I mean worried, frightened or unhappy. The outbreak of COVID-19 has made everyone’s life more_______. Some cities are still quarantined. As a result, many people still can’t leave their homes. While we have all been stuck at home much longer than we_______, you may have perhaps come to notice something,　 as I have. You　 might have_________that your potential( 潜 能 ) has not been limited as much as you first thought.

This has been a good chance for all of us to learn how to better_______our resources. After　 all, many students have been asked to start the _______semester( 学 期 ) by taking classes online. I have been_______by some of my own students.　 They used to_______about homework assignments. Now, they are able to responsibly manage their own classwork. Supervision( 监 督 ) from their parents or teachers, it seems, is no longer_______!

Additionally, with a simple internet connection, you may have access to a_______variety of free online resources. I have recently started using Duolingo to review my Chinese, Korean and Spanish.

Finally, you might find that you are able to give your parents a ________around the house. I　 cleaned　 up　 the　 apartment　 I　 share　 and　 do　 the　 dishes　 every　 day.　 I　 taught________how　 to　 cook baguettes(法式长棍面包). I even planted some vegetables in pots — my first time ever doing so in my seven years in China.

Maybe you haven’t yet found your inner potential. Tough( 艰 苦 ) times don’t ________; tough people do.__________your life might be more difficult now, this hard time will ultimately make you a stronger person. How much stronger you will become all________you.

________cloud has a silver lining. What is your silver lining?

1.A.different B.dangerous C.enjoyable D.difficult

2.A.expected B.suggested C.hoped D.wished

3.A.invented B.created C.discovered D.produced

4.A.buy B.manage C.provide D.measure

5.A.spring B.summer C.autumn D.winter

6.A.angry B.worried C.surprised D.scared

7.A.think B.dream C.care D.forget

8.A.believable B.necessary C.reasonable D.unusual

9.A.wide B.deep C.long D.far

10.A.foot B.leg C.hand D.face

11.A.herself B.himself C.itself D.myself

12.A.stay B.last C.disappear D.finish

13.A.While B.Unless C.Until D.Since

14.A.sticks to B.starts with C.depends on D.prepares for

15.A.All B.Both C.Either D.Every

九年级英语完型填空困难题查看答案及解析

There have been many great inventions or things that changed the way we live. The first great invention was the one that is still very important today——the wheel. This made it easier to carry heavy things and to travel long distance.

For hundreds of years after that there were few inventions that had as much effect as the wheel . Then in the early 1800s the world started to change. There was little unknown land left in the world. People didn’t have to explore much any more. They began to work instead to make life better.

In the second half of the 19th century many great inventions were made. Among them were the camera, the light and the radio. These all play a big part in our daily life today.

The first part of the 20th century saw more great inventions. The helicopter in 1909, movies with sound in 1926, the computer in 1928, jet planes in 1930. This was also a time when a new material was first made. Nylon came out in 1935. It changed the kind of clothes people wore.

The middle part of the 20th century brought new ways to help people get over diseases. They worked very well. They made people healthier and allowed them to live longer. By the 1960s most people could expect to live to be at least 60.

By this time most people in developed countries had a very good life. Of course new inventions continued to be made. But man now had a desire(渴望) to explore again. The earth was known to man but the stars were not. Man began looking for ways to go into space. Russia made the first step. Then United States took a step. Since then other countries , including China and Japan, have made their own steps into space.

In 1969 man took his biggest step away from earth. Americans first walked on the moon. This is certainly just a beginning, though. New inventions will some day allow us to do things we have never yet dreamed of.

1.This passage talks mainly about _______________ .

A．why cars were very important

B．when light was invented

C．how inventions affect people’s daily life

D．which country made the first step into space

2.According to the passage man didn’t have a desire to explore a lot ___________.

A．at the beginning of 1800s

B．in the 1960s

C．since the 1900s

D．from the 1800s to 1960s

3.Nylon came out five years later than____________ .

A．radio             B．camera           C．jet planes         D．movies

4.People can live longer lives because ________ that help cure diseases have worked very well.

A．doctors                               B．new ways

C．medicines                             D．new hospitals

九年级英语阅读理解中等难度题查看答案及解析

There have been many great inventions or things that changed the way we live. The first great invention was the one that is still very important today---the wheel. This made it easier to carry heavy things and to travel long distance.

For hundreds of years after that, there were few inventions that had as much effect as the wheel. Then in the early 1800s the world started to change. There was little unknown land left in the world. People didn’t have to explore much any more. They began to work instead to make life better.

In the second half of the 19th century, many great inventions were made. Among them were the camera, the light and the radio. These all play a big part in our daily life today. The first part of the 20th century saw more great inventions. The helicopter(直升机) in 1909, movies with sound in 1926, the computer in 1928, jet planes(喷气式飞机) in 1930. This was also a time when a new material was first made. Nylon(尼龙) came out in 1935. It changed the kind of clothes people wore.

The middle part of the 20th century brought new ways to help people get over diseases. They worked very well. They made people healthier and allowed them to live longer. By the 1960s most people could expect to live to be at least 60.

By this time most people in developed countries had a very good life. Of course new inventions continued to be made. But man now had a desire(渴望) to explore again. The earth was known to man but the stars were not. Man began looking for ways to go into space. Russia made the first step. Then United States took a step. Since then other countries, including China and Japan, have made their own steps into space.

In 1969 man took his biggest step away from earth. Americans first walked on the moon. This is certainly just a beginning, though. New inventions will some day allow us to do things we have never yet dreamed of.

1.In the 1800s, people began to work in order to make　 　　　　　　 .

A. explorations　　　　 B. their life better

C. discoveries　　 　　 D. a trip to space

2.Nylon came out of five years later than 　　　　　　　 .

A. radio　　　　　 　　 　 B. camera

C. jet planes　　 　　　 D. movies

3.People can live longer lives because 　　　　　　　　 that help cure diseases have worked very well.

A. new ways　　　　　　 B. doctors

C. medicines　　　　 　 D. new hospitals

4.This passage talks mainly about 　　　　　　 .

A. why cars were very important

B. how inventions affect people’s daily life

C. when light was invented

D. which country made the first step into space

九年级英语阅读理解中等难度题查看答案及解析