We have been used to wearing masks(口罩)in publ...

We have been used to wearing masks(口罩)in public since February. About 300 million masks are used and then thrown away every day in China. Where do these masks go? You might think they just go in a rubbish bin. But that's just the first stop on the masks' journey.

After the masks are thrown into the bins, rubbish trucks empty the bins and take the rubbish to landfills(垃圾场). Next, the masks will be taken to rubbish incinerators(焚化炉)and burned. Burning masks might not seem to be very good for the environment. Won't it cause pollution?

The answer is "no", according to China Daily. The main material of most masks is polypropylene(聚丙烯). It's non-toxic(无毒的). After burning, it changes into water and CO2.

In fact, burning the masks can bring some benefits(益处). The process of burning the rubbish can produce electricity. Burning one ton of rubbish can produce more than 400 kilowatt hours(度)of electricity. Some people make a prediction that there will be 162,000 tons of used masks in China this year. Burning all of them can produce more than 64 million kilowatt hours of electricity. This is enough to make an electric car drive about 370 million km, which is 9,250 times as long as the earth's equator.

At last, the slag(残渣)from burning masks can be recycled to make bricks(砖块)or fill the roads.

1.How many masks are used and then thrown away every day in China?

A.More than 64 million. B.About 300 million. C.About 370 million. D.About 9,250 million.

2.The first stop on the masks' journey is ________.

A.electricity factories B.landfills C.rubbish trucks D.rubbish bins

3.The main material of most masks is________.

A.plastic B.polypropylene C.water D.CO2

4.Which of the following is TRUE according to the passage?

A.Burning masks won't cause pollution.

B.People are not used to wearing masks in public.

C.There are 162,000 tons of used masks every month in China.

D.The process of burning the masks can produce electricity and bricks.

5.What is the best title of the passage?

A.How do We Burn Used Masks? B.How do People Produce Electricity?

C.Where do the Used Masks Go? D.Why do We Throw Away Used Masks?

九年级英语阅读单选中等难度题查看答案及解析

COVID-19（新冠病毒）has stopped people from working for several months. In recent days, many people have returned to work. 1. Here is some advice.

When commuting（通勤）

Avoid taking public transport. 2. If you have to take public transport, you shall wear a face mask（口罩）through the ride and try to avoid touching objects in the vehicles（车辆）with your hands.

Entering the workplace

Wear a face mask and receive body temperature check before entering the office building. You must pass the body temperature check before being allowed in. 3. If you have signs such as fever, please go to the fever office of a hospital at once.

Using a lift

Avoid using the lift if you are going to or leaving lower floors. Use the stairs instead. Stand clear of lift doors while waiting. 4.

In offices

5. Do it three times a day for 15 minutes to half an hour each time. You can only get infected（感染的）if the virus builds up in large numbers. Fresh air can stop the virus from building up.

Keep healthy habits such as eating a healthy diet, exercising and getting enough sleep. They can improve your immunity（免疫力）.

A.Try to walk, cycle or drive to your office instead.

B.What steps of prevention（预防）and control are needed?

C.Do not stand face to face with people while waiting.

D.Open windows to let fresh air in during the day.

E.Wash hands in time.

九年级英语补全短文5选5中等难度题查看答案及解析

It’s necessary ________ masks（口罩）in public places during the COVID-19 period.

A.for us to wear B.for us wearing C.of us wearing D.of us to wear

九年级英语单选题中等难度题查看答案及解析

—At this special time of the COVID-19, we have to wear masks (口罩)if we go out.

—________. It is responsible for ourselves and others.

A.Never mind B.I agree C.Sorry D.Not at all

九年级英语单选题简单题查看答案及解析

阅读下面短文，并根据所读内容，在文章后每个 小题的空格里填入一个最恰当的单词。注意：每个空格只填 1 个单词。

Because of the novel coronavirus, it is useful for many people to wear masks to avoid illness. In fact, masks have been helping humans for centuries. Let’s take a look at something about masks.

1st century

During that period, many people in Roman Empire lived a hard life and had to work underground in mines to support their families. But after several years’ work, most of them had difficulty breathing normally and finally died. To solve this problem, Pliny the Elder (23-79 AD), a Roman philosopher and naturalist, recommended the use of animal bladder ( 膀 胱 ) skins to stop dust from being taken in. After that, his idea was considered the very first recorded mask invention.

16th century

Early inventions did not stop with Pliny. Many centuries later, Italian artist and inventor Leonardo da Vinci (1452-1519), put forward a suggestion of using a wet cloth over the face to protect against the harmful chemicals.

19th century

The design of the mask took a big step forward in the 19th century. In 1848, American Lewis Hassley started to patent (注册) a protective mask for miners, which was a landmark. Masks at this stage were similar to gas masks. Later, in 1897, Polish-Austrian doctor Johann von Mikulicz-Radecki designed a simple mask made of one layer of gauze ( 纱 布 ), recommending medical workers to wear it to prevent infection. Since then, surgical masks have appeared.

20th century

In 1910, an epidemic broke out in Northeast China. Chinese doctor Wu Liande designed a cheap face mask called “Wu’s mask”. Made of two layers of surgical

gauze, it could be wrapped (缠绕) around the back of the head and tied in a knot. This mask was praised by experts around the world, as it was easier to make and had a lower production cost.

Modern exploration

With the development of science technology, the materials in masks have been improved to better protect its wearer. For example, in 2012 when China suffered from smog, mask models such as N95 and KN90 became highly popular. In the future, masks will continue to improve, hopefully so will the habits of humans.

九年级英语信息归纳中等难度题查看答案及解析

We ________ wear masks to keep away from COVID-19 in public.

A.must B.may C.can D.need

九年级英语单选题简单题查看答案及解析

It's reported that a Chinese company has created a new facial recognition system that can identify (识别) people even if they are wearing masks. Developers began working on the new system in January 2020 when the novel coronavirus appeared in China. The fast spread of the virus has led most people to wear masks in public to protect themselves and people around.

China is regarded as a world leader in the development of artificial intelligence (AI). According to engineers at the Beijing——based Hanwang Technology Ltd, this system is the first to be created to identify people wearing face masks. A team of 20 engineers completed it in about a month, adding a collection of about 6 million unmasked faces and a smaller collection of masked faces," the company said.

Hanwang is now selling two main kinds of products using the new technology. One performs single channel recognition (单通道识别), which will be used at the entrances to buildings. The other product is a multi—channel (多通道识别) recognition system that uses groups of cameras. It's said thatthe multi—channel system can identify a person in a crowd of up to 30 people within a second.

When people wear a mask, the recognition rate　 can reach about 95 percent," said Huang Lei, Hanwang's vice president. The system's success rate for people without wearing a mask is about 99. 5 percent."

Nowadays the new system is trying to identify people with both sunglasses and a mask. In such cases, all of the key facial information is lost, making recognition hard," Huang said.

1.What does Paragraph 1 mainly want to tell us?

A.The truth that people should wear masks in public.

B.The reason why a new facial recognition system was created.

C.The time when the novel coronavirus appeared in China.

2.How is the facial recognition system able to recognize masked faces?

A.After many unmasked and masked faces are stored in it.

B.After just a large collection of masked faces are added to it.

C.After 20 engineers work hard for a month.

3.What do we know about the multi—channel recognition system?

A.It can identify people with sunglasses and masks.

B.It can be found at the entrances to buildings.

C.Many cameras are used at the same time.

4.Which part of the head does the system mainly pay attention to when a person wears a mask?

A.The hair. B.The ears. C.The eyes.

5.The writer wrote the passage to________.

A.show the rapid development of China

B.explain the popularity of AI

C.introduce a new recognition system

九年级英语阅读单选困难题查看答案及解析

When everyone in China is wearing masks (口罩) to stop the COVID-19 (新冠肺炎), many people in Western countries don’t seem to want to do the same. For example, an Italian lawmaker was criticized (批评) by his coworkers when he went to work with a mask. They said he made them nervous. But why do the East and West have different ideas about wearing masks? Let’s take a look.

Western ideas about masks

In the West, people should wear masks only when they get sick, for example. People see masks as a tool (工具) to protect sick people and stop disease from spreading (传播), so healthy people don’t need to wear them. But as the number of COVID-19 cases is growing around the world, people in the West are changing their ideas.

Mask culture in the East

In Asian countries like China and Japan, wearing masks is common. In 1910, Chinese doctor Wu Liande invented (发明) the modern medical mask. During the 2003 SARS epidemic (流行病疫), people in China and East Asia also used masks to protect themselves.

In Japan, wearing masks shows your politeness (礼貌) when you get a cold or flu. Some Japanese also turn masks into fashion accessories (配饰). They have different colors and patterns to choose to match their clothes. Some young women wear masks when they don’t have their makeup (化妆) on.

Many pop stars in Asia also use masks to protect their privacy (隐私). This cultural and historical background has made it easier for people in the East to wear masks when epidemics break out.

1.What did the coworkers think of the Italian lawmaker?

A.He was too worried to work. B.He made other people nervous.

C.He was unwilling to go to work. D.He was just trying to protect himself.

2.In the past, people in the West wore masks when _____________.

A.they were sick B.they were talking to doctors

C.they were shy or worried D.they went outdoors

3.Where was the modern medical mask invented?

A.In the UK. B.In Japan. C.In China. D.In the US.

4.The reasons why Asian people like to wear masks do NOT include ___________.

A.wearing masks to stop disease from spreading B.protecting against air pollution

C.looking fashionable D.protecting their privacy

5.What is the story mainly about?

A.Why masks are popular in Asian culture.

B.The importance of wearing masks during epidemics.

C.Why Western people don’t wear masks during epidemics.

D.Masks mean different things in different cultures.

九年级英语阅读单选中等难度题查看答案及解析

Everyone knows that the novel coronavirus can spread through droplets(飞沫).Wearing a mask is not only responsible for our own health, but also for the health of others.Academician(院士) Zhong Nanshan has stressed the importance of wearing the mask on lots of occasions over and over again,and demonstrated how to wear and remove a mask properly in person.

There are some questions about masks in people's hearts.Today,we have chosen the questions that almost everyone cares about and answer them.

Which type of mask should we choose?

In this outbreak,medical protective masks(GB 19083-2010) and medical surgical masks (YY 0469-2011) are preferred.The above two types of masks are mainly for medical staff and are in short supply now.We can also choose medical care masks.

As for other types of masks,such as cotton masks,sponge masks,activated carbon masks,these are not suggested. Although they look thick,they have no effect on preventing viruses,while medical masks look thin but have good effects.

How often should the ordinary people change their masks?

Ordinary people don't have to change masks one at a time.If the following problemshappen,you need to change the mask.

·The mask nose clip(夹子) doesn't work.

·The mask ear ropes don't work.

·The mask is out of shape.

·The mask becomes dirty.

·Breathing resistance(阻力) increases.

Do we need to wear a mask at home?

Ordinary person does not need to wear a mask at home.But if someone in this family hasa fever,sneezing,runny nose and other symptoms(症状),every family member is advised to wear a mask.

How to remove the mask correctly?

When removing the mask,you should remove the ear ropes from both ears,do not touch the outside surface of the mask,and throw it directly into a safe trash bin.

If you want to reuse the mask,do not put it directly in the bag,pocket,etc.You can fold it from the inside to the outside and put it in a sealed(密封的) bag.

What should we do after using a mask?

·For ordinary people,throw the mask directly into the trash bin.

·For people who have symptoms such as fever,cough,sputum(痰),sneezing,or thosewho have stayed with such people,it is advised to throw the masks in the trash bin,then sprinkle 5% 84 disinfectant(消毒液).

·For suspected(疑似的) people,the masks must be treated as medical waste by the professional medical staff.

1.What does the underlined word“remove”in Paragraph 1mean?

A.take off B.turn off C.put on D.take out

2.Which type of mask should we choose in this outbreak?

A.cotton masks B.sponge masks

C.medical care masks D.activated carbon masks

3.When do we need to change the mask?

A.When the nose clip of the mask doesn't work.

B.When the ear ropes of the mask become loose(松的).

C.When you feel difficult to breath with it.

D.All the above.

4.What kind of people can throw the mask directly into the trash bin?

A.Ordinary people. B.Suspected people.

C.People who cough. D.Professional medical staff.

5.Which of the following is TRUE according to this passage?

A.Wearing a mask is mainly for the health of yourself.

B.Everyone knows the knowledge about masks clearly.

C.The novel coronavirus can spread only through droplets.

D.If you want to reuse the mask,you have to put it in a sealed bag.

九年级英语阅读单选中等难度题查看答案及解析

The World Health Organization (WHO) has announced the novel coronavirus (冠状病毒) outbreak a global public health emergency (突发事件) after the spread of the disease across the world. WHO made the decision in its third meeting about the coronavirus, after it decided not to take such a step in the first two meetings. It is considered to be a public health risk through the international spread of disease. It suggests a serious, sudden and unusual situation in which the world must act quickly. Since 2009, there have been a few global health emergencies, including the 2009 swine flu pandemic（猪流感） and the 2014 outbreak of ebola in West Africa.

The novel coronavirus has got attention because of its similarity to SARS which killed about 800 people across the world in 2002-2003. So far, the novel coronavirus does not seem to be as deadly as SARS, but there have been more cases. Its declaration could　 cause trade and travel restrictions (限制). Those who have made holiday plans might have their plans influenced in some parts of the world. The WHO said its greatest worry was the potential (潜在性) for the virus to spread to counties with weaker health systems, who might not be able to deal with it. “We are all in this together and we can only stop it together,” said the WHO’s Director General, Tedros Adhanom Ghebreyesus.

When the virus hit China, many companies that make cars, smartphones and clothes started making face masks, too. Daddy Baby is a baby care company. It can make 700,000 masks each day. “We believe each mask we produce may save one more person,” said Lin Yangting. He is a manager at the company. When fighting the novel coronavirus, time is important. To save more lives, thousands of people work day and night. They build hospitals quickly, as well as make and transport medical things at a high speed. The surprising speed is a result of China’s unique system (独特的角度). With the Chinese speed, China has saved many patients.

1.What does the underlined phrase “take such a step” mean in the first paragraph?

A.Spread the coronavirus across the world.

B.Announce the coronavirus a global public health emergency.

C.Hold the third meeting about the coronavirus.

D.Restrict trade and travel across the world.

2.Which of the following statements is TRUE?

A.The 2009 swine flu pandemic was a global public health emergency,

B.SARS killed about 800 people across the world in 2009.

C.The new coronavirus has fewer cases than SARS.

D.The spread of the coronavirus has no risk.

3.What could the declaration of global public health emergency cause?

A.Bigger outbreak of the coronavirus. B.Trade and travel restrictions.

C.A weaker health system. D.Immediate stop of the coronavirus.

4.Why does WHO worry about the potential for the virus to spread to countries with weaker health systems?

A.Because these countries don’t have the ability to deal with it.

B.Because these countries are not brave enough.

C.Because these countries won’t pay attention to it.

D.Because these countries have too many people.

5.Which of the following things is NOT done by Chinese in the passage?

A.Making face masks. B.Thousands of people work day and night.

C.Building hospitals quickly. D.People travel everywhere.

九年级英语阅读单选困难题查看答案及解析