Dr Almeida left school at 16 with little formal education but got a job as a laboratory technician in histopathology ( 组织病理学 ) at Glasgow Royal Infirmary. Later she moved to London to further her career and in 1954 married Enriques Almeida, an artist.
The couple and their young daughter moved to Toronto in Canada and it was at the Ontario Cancer Institute that Dr Almeida developed her outstanding skills with an electron microscope.
She pioneered a method which better visualized ( 成像 ) viruses by using antibodies to gather them. Her talents were recognized in the UK and she was invited to work at St Thomas’s Hospital Medical School in London.
On her return, she began to cooperate with Dr David Tyrrell. Dr Tyrrell and his team were able to grow quite a few common cold-associated viruses. One sample, known as B814, was discovered in 1960. They found that they were able to transmit ( 传染 ) common cold symptoms to volunteers but they were unable to grow it in routine cell culture ( 细胞培养 ). However, volunteer studies showed its growth in organ cultures ( 器官培养 ). Dr Tyrrell wondered if it could be seen by an electron microscope. They sent samples to Almeida who found that they were like flu viruses but not exactly the same. She identified what became known as the first human coronavirus ( 冠状病毒 ).
Dr Almeida had actually seen particles ( 微粒 ) like this before while investigating viruses in mice and chickens. However, when she sent her paper about this discovery to a medical journal, it was rejected. It was two years later that the first photographs of the virus she had seen were published in Journal of General Virology. It was named coronavirus because of the crown surrounding it on the viral image.
1.Why did Dr Almeida return to work in the UK ?
A.Because her family did not like Toronto.
B.Because the UK appreciated her talents.
C.Because she bettered an electron microscope.
D.Because she was the first one to visualize viruses.
2.What can we know about B814?
A.It could be grown in routine cell culture.
B.It was unable to develop in organ cultures.
C.It’s exactly the same with influenza viruses.
D.It was identified as the first human coronavirus.
3.What can we connect with the name “coronavirus”?
A.Its viral image.
B.Its deadly power.
C.It original sample.
D.Its first appearance.
阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。续写的词数应为150左右。
David Aguilar is a boy born without his right arm. Because of that, Aguilar has always stood out from the persons at the same age. As a child, he was very nervous to be in front of other guys, because he thought that he was different. While growing up, Aguilar had to learn how to do everything with just one hand. Although he was able to do almost everything people with two hands can do, Aguilar explained that he still thought about getting a prosthetic hand (假肢) throughout his childhood just so that he could look a little bit more normal and fit in with everyone else.
When Aguilar told his parents that those arms were cool because they were mechanical (机械的) and could make you look like a robot, his parents began thinking about buying a prosthetic arm for Aguilar. However, when Aguilar' s parents started looking into getting their son a prosthetic hand, they discovered how expensive it was. And they couldn't afford to buy one for their son.
Yet when Aguilar was playing with his Lego (乐高) at the age of nine years old, he started experimenting with building his own prosthetic arm. He didn't know it at the time, but his favorite toy was about to change the way he viewed himself as well as change the course of his life. At first, he just wanted to create something that could help him and be part of him. As he linked the blocks together around his arm, he just started making this prosthetic from Lego. When Aguilar looked at himself in the mirror for the first time with his Lego prosthetic, he was amazed by what he saw.
However, the arm wasn't the most strong and would often bend and break if he tried to do any heavy lifting with it. So almost ten years later, Aguilar set out to build himself a new prosthetic arm and he hoped to help more people who didn't have enough money to buy prosthetic hands. One day, one of his dad's friends gave him a Lego plane as a gift, but all he saw was an arm.
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假定你是李华，你的笔友Tom最近因不适应上网课而感到焦虑。他了解到你最近也在上网课，来信向你咨询。请你给他写一封回信，内容包括：
1.表达你的同感；
2.网课的优势；
3.具体调整建议。
注意：1.词数80左右；
2.可以适当增加细节，以使行文连贯；
3.开头与结尾已给出，不计人总词数。
Dear Tom,
Thanks for your letter. ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Yours,
Li Hua
My parents were so proud of me, especially of something I accomplished. This is one of my happiest memories and, sadly, also the _______ I have of my parents. They _______ in one evening when some drunken men crashed their car into them.
From then on, I was _______. I missed them greatly, but_______surprisingly well on my own. If they were alive, they would be most _______ of the moment I met my best friend, Eliza Jones. I'm also most proud of that _______
It was a June evening. I was seventeen years old and sitting on a tree branch, listening to the music the water created under the bridge. Just then I noticed a(n) _______ appear on the bridge. Suddenly it stopped on the top of the bridge and _______ to the river.
I _______ up and launched myself at the falling figure. I had never swum at this ________. I had to catch it; ________ I would never forgive myself. I swam faster and faster and ________ the figure. I laid the person on the riverbank and found it was a girl, about my age. She asked me why I tried to ________ her. I said I couldn't just watch someone didn't ________ her life. Then we talked and I found we both liked to read about fairies.
She told me she was a writer who wanted to travel around the world and write amazing fantasy novels. I was glad she had a target for the future. I said, ''Tomorrow morning the sun will rise, bringing with it the ________ of another start. '' And she promised she would continue living well. After that I had a fond memory of the bridge.
1.A.easiest B.longest C.deepest D.last
2.A.died B.escaped C.returned D.married
3.A.stubborn B.nervous C.unaccompanied D.impatient
4.A.travelled B.played C.changed D.managed
5.A.frightened B.proud C.aware D.confident
6.A.moment B.advice C.achievement D.dream
7.A.accident B.poster C.pattern D.figure
8.A.referred B.jumped C.turned D.pointed
9.A.turned B.spoke C.shot D.woke
10.A.atmosphere B.speed C.length D.chance
11.A.otherwise B.instead C.however D.besides
12.A.created B.discovered C.grasped D.abandoned
13.A.rescue B.remember C.support D.suspect
14.A.review B.treasure C.check D.choose
15.A.background B.operation C.appointment D.promise
A community feels more alive when people who live there try to help improve it. If you look around and see that your community has a lot of problems, there's no better time to start fixing them than right now. 1.
Stop to offer help when and where you're needed
It's a simple way to create the atmosphere that makes people feel safe and happy. If you see someone in need of assistance, come to their aid instead of looking on. 2.
Volunteer in your community
Donating your time is an excellent way to have a positive effect on your community. 3. It costs organizations a lot of time and money to train volunteers, so make sure that you will be available and willing to help out on a long-term basis.
4.
You can help in many ways. Consider starting your own business. In this way you can serve your community by offering a great product and possibly even hiring employees. And try to get most of your produce from the local market and shop at local stores.
Attend community events
How often do you show up to community events? 5. Just showing up is a way to help people in your community because it lets them know that you care. For example, if someone is trying to hold a “Bike to Work or School Day” on Monday mornings, and you've got a bike, why not give it a try? Show people in your community that biking is fun.
A.Learn about organizations
B.Support your local economy
C.Start participating in community activities as many as you can
D.Just be aware that becoming a volunteer is a serious commitment
E.Keep reading for ideas on how to help make your community better
F.Hold activities in an effort to make the neighborhood a better place
G.Do for others what you'd want them to do for you if you were in their situation
A recent study conducted by researchers from Canada's Wilfrid Laurier University found that the snakes actively seek out socialization with their peers （同伴），but also they are extremely particular about who they spend time with. However, snakes used to be thought of as solitary animals. They are seldom seen hanging out in groups.
A team of researchers led by Morgan Skinner and Dr. Noam Miller selected 40 non-poisonous garter snakes （袜带蛇）. Ten were purchased from a snake keeper and the rest were caught in the wild. After marking each snake with a spot of color to allow for easy identification, the researchers placed ten snakes inside each of the four plastic shelters.
Skinner photographed each snake group twice a day before removing them from their shelters. After cleaning the areas thoroughly to rid them of any familiar smells, the reptiles were rearranged into different groups, and returned to the enclosure. A camera fixed over the shelters allowed the scientists to track the animals' movements for a total of eight days.
When Skinner and Miller analyzed the images, they found that regardless of where they were placed, the snakes always slipped back to their origin al "friends" forming groups of three or eight inside the small shelters. “They can tell others apart,” Miller said.
Gordon Burghardt, a biologist, says, "The study should help convince people that snakes have more social intelligence than most of us realize."
Miller believes the research could help with snake protection efforts. Endangered snake species relocated to safer habitats often leave these areas. Now, conservationists may be able to avoid that by transferring entire snake groups to the new location. Alternatively, they could also spray （喷洒）the new habitat with the species' smells to make transplants feel at “home."
1.What does the underlined word "solitary" mean in paragraph 1?
A.Causing fear. B.Existing only in small numbers.
C.Causing death or illness. D.Enjoying being alone.
2.What can we learn from the last paragraph?
A.The findings can contribute to snake conservation.
B.Snakes like to spray smells on the trees.
C.Snakes are easy to adapt to new locations.
D.Snakes tend to stay in safer habitats.
3.Which of the following proverbs can be used to describe the findings?
A.Barking dogs don't bite. B.The early bird catches worms.
C.Things of one kind come together. D.A friend in need is a friend in deed.
4.In which section of a newspaper may this text appear?
A.Entertainment. B.Science.
C.Education. D.Health.
