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题型:阅读理解 题类:常考题 难易度:普通

阅读理解

    Mosquitoes have an extraordinary ability to find humans far away and fly straight to their skin. Mosquitoes can do more than cause an itchy (发痒的)wound. Some mosquitoes spread several serious diseases, including Dengue, yellow fever and malaria.

    Over one million people worldwide die from these diseases each year. New research now shows how mosquitoes choose who to bite.

    Mosquitoes need blood to survive. They are attracted to human skin and breath. They smell the carbon dioxide gas, which all mammals breathe out. This gas is the main way for mosquitoes to know that a warm-blooded creature is nearby.

    But mosquitoes also use their eyes and sense of touch. Michael Dickinson is a professor at the California Institute of Technology. His research shows how these small insects, with even smaller brains, use three senses to find a blood meal.

    Michael Dickinson's team used plumes—a material that rises into the air of carbon dioxide gas into a wind tunnel (隧道). They then used cameras to record the mosquitoes. The insects followed the plume.

    Then, the scientists placed dark objects on the lighter colored floor and walls of the tunnel. Mr. Dickinson said, at first, the mosquitoes showed no interest in the objects at all. “What was quite surprising is that the mosquitoes fly back and forth for hours. These are hungry females and they completely ignore the objects on the floor and wall of the tunnel. But the moment they get a hit of CO₂, they change their behavior quite obviously and now would become attracted to these little visual blobs (斑点).”

    This suggested to the researchers that a mosquito's sense of smell is more important in the search for food. Once mosquitoes catch a smell of a human or animal, they also follow visual signals.

(1)、What do mosquitoes mainly use to find their food?

A、Sense of smell.  B、Sense of touch. C、Sense of sight. D、Smart brains.
(2)、The first response of the mosquitoes to the objects in the experiment is ________.

A、to fly to the dark ones B、to catch and stick to them C、to take no notice of them D、to attach themselves to them
(3)、How can we avoid being attacked by mosquitoes according to the text?

A、Don't let them see us. B、Use dark objects to stop them. C、Make them fly back and forth for hours. D、Attract them to objects full of carbon dioxide gas.
(4)、What can be the best title for the text?

A、How Do Mosquitoes Survive? B、Why Do Mosquitoes Need Blood? C、How Do Mosquitoes Choose to Bite You? D、Why Do Mosquitoes Attack the Human Being?
举一反三
阅读理解

Arriving in New York

    There are three airports in New York. When you arrive at one of them, you can take a bus or a taxi to any place in New York.

Eating out

    There are many kinds of food in New York. And you shouldn't eat at McDonald's every day. There are good restaurants in Little Italy and Chinatown, for example.

Hotels

    There are lots of good hotels in New York. The best is the Plaza on the 5th Avenue(大街), but you don't have to spend a lot in the city, there are lots of smaller hotels. The YMCA near the Central Park is great for young people.

Public Transport(交通)

    In New York, there's a good bus and subway(地铁)service. If you are planning to use the subway a lot, you should buy a subway ticket for the journey because it's cheaper. But you don't have to use the public transport, there are lots of places you can go to on foot, such as the Empire State Building, the 5th Avenue and the Central Park. The New Taxis are a part of the city experience, so you should take at least one taxi during your visit!

Places to see

    Finally, there are a lot of places to see in New York—the Times Square, the Statue of Liberty, and so on. And you shouldn't go home without climbing the Statue of Liberty to enjoy the scenery of the city.

Shopping

    Shopping in New York is fun. There are big shops on the 5th Avenue. They are seven days a week. But be careful when you look at the prices; you have to pay a special 8% tax(税)on everything you buy in New York.

阅读理解

    A couple had a son eleven years after they married. They were a loving couple and the boy was the apple of their eye. When the boy was around four years old, one day the father was very tired after work so he asked his wife to pick up their son. The mother, who was very busy in the kitchen, totally forgot about it.

    Later the boy lost his way on the street. When the son was found missing, the mother hurried to look for him, but she didn't find him. The mother felt very sad and didn't know how to face her husband.

    When the father went to the police station after hearing that the son was missing, he looked at his wife and said just four words. What do you think the four words were? The husband just said “I love you, darling.”

    The son was missing. If she had picked him up earlier, this would not have happened. There is no point in blaming (责备) anyone. His wife had also lost her only child. What his wife needed at that moment was comfort and understanding from her husband. That is what the husband gave his wife. Several weeks later, with the help of the police, the couple finally found their lost son. The family's relationship became stronger over that time.

    Sometimes we spend lots of time asking who is to blame. We miss many chances to give each other support and let each other feel the warmth of human relationships. Get rid of all your unwillingness to forgive, selfishness, and fears and you will find the world is much more wonderful.

阅读理解

    Some people think that success is only for those with talent or those who grow up in the right family, and others believe that success mostly comes down to luck. I'm not going to say luck, talent, and circumstances don't come into play because they do. Some people are born into the right family while others are born with great intelligence, and that's just the reality of how life is.

    However, to succeed in life, one first needs to set a goal and then gradually make it more practical. And, in addition to that, in order to get really good at something, one needs to spend at least 10,000 hours studying and practicing. To become great at certain things, it'll require even more time, time that most people won't put in.

    This is a big reason why many successful people advise you to do something you love. If you don't enjoy what you do, it is going to feel like unbearable pain and will likely make you quit well before you ever become good at it.

    When you see people exhibiting some great skills or having achieved great success, you know that they have put in a huge part of their life to get there at a huge cost. It's sometimes easy to think they got lucky or they were born with some rare talent, but thinking that way does you no good, and there's a huge chance that you're wrong anyway.

    Whatever you do, if you want to become great at it, you need to work day in and day out, almost to the point of addiction(沉迷), and over a long period of time. If you're not willing to put in the time and work, don't expect to receive any rewards. Consistent, hard work won't guarantee you the level of success you may want, but it will guarantee that you will become really good at whatever it is you put all that work into.

阅读理解

    I've been researching my family tree since 1998 ,and I've long been curious about DNA as a way to learn more about my roots. The technology has come a long way in the last decade, and it's become more affordable too. Finally, I went ahead and ordered a Y-DNA test.

    The results came in my email inbox from the DNA lab! When I logged in to see the results, there are 29 living people today with whom I share a common direct male ancestor in about the last 1,000 years. They live in Ireland, England, Scotland, South Africa, the United States and probably elsewhere.

    I had two close matches, and the rest were more distant. They both live in Ireland! What makes the connection  to these two men so interesting is that most Irish genealogical (族谱的)records were burned in fires in Dublin and don't exist today. Without them, it's hard to trace Irish roots any further back than the 1800s. I've written emails to both of them and hope to hear back!

    I did some more research on my Y-DNA and found my direct male ancestors were Celtics. They seem to have lived in Western Europe at the time of Ancient Rome. Migration patterns show that my DNA group likely originated in Western Asia, living there 20, 000 and 30, 000 years ago. There are relatives with similar DNA going thousands of years back in what is now Iran, India, Syria, Israel and Turkey.

    I was so excited by these results that I decided to trace my motherly line too. My DNA is already at the lab, so now I just have to wait another month or so, and I'm sure to find more interesting things.

阅读理解

    The British economy is showing the greatest signs of stress since the Eurozone crisis and fears of a double-dip recession(衰退)six years ago, as worrying reports show the steepest fall in manufacturing(制造业)output and the greatest degrees of pessimism among employers since 2012. Concerns over Brexit(英国脱欧)and a slowdown for high street spending are among the major factors contributing towards 2018 being the worst time in six years for British firms planning to take on new staff, according to a closely watched survey conducted by the employment firm ManpowerGroup.

    Watched by the Bank of England and the government for early warnings of hiring increases or downturns, the quarterly poll(季度民意调查)of about 2,000 major employers from nine different industry sectors across the UK found a net balance of only 4% planning to hire more staff rather than cutting back.

    The weakest outlook from the survey was reserved for the banking and finance industry, which recorded the worst outlook since the depths of the financial crisis almost a decade ago, suggesting job cuts may be on the way over the summer.

    The barometer(晴雨表)of hiring sentiment comes as Britain's factories unexpectedly recorded the sharpest drop in output for more than five years in April. Pointing to fewer orders for steel used in infrastructure(基础设施)projects and a wider slowdown in demand for British goods at home and abroad, the Office for National Statistics said manufacturing output fell by 1.4% in April from the previous month. Economists had forecast modest growth of 0.3%.

    Although the situation does not appear to be as severe this year, forecasts issued by the National Institute of Economic and Social Research on Monday suggest the UK has done little to bounce back from heavy snowfall earlier in 2018. Putting the growth rate for GDP at only 0.2% in the three-month period to May, up from 0.1% in the same period ending in April, Niesr's head of UK macroeconomic forecasting, Amit Kara, said: “Economic growth has slowed materially since the start of this year and it continues to remain weak.”

阅读理解

    It was late one evening. I can't remember what it was about, but my dad and I had a very big argument when my mom was away. We both said things we didn't mean, and in the end I said, "I'm leaving." And he said, "Good. The sooner, the better."

    I threw a few things in a suitcase and closed the door angrily behind me, not knowing where I was going. After walking aimlessly for about 20 minutes, I stopped at a local supermarket. Then my phone rang. It was my mom calling. She said, "Hey, Mary. Where are you?Dad is worried about you."

    "How can he worry about me?I've been away for nearly half an hour, but he didn't call," I said with annoyance(气恼). My anger returned and I remembered all the hateful things he'd shouted to me. "Listen, Mom. You can tell Dad that I'm fine. I'll call you tomorrow," I said and hung up.

    I walked around the store, trying to get my thoughts together. By the time I paid for my purchases, it had been much later than I used to be out alone. When I left the supermarket, a large piece of white paper was in front of me. On the piece of white paper were these words: "Please come home! I miss you and I'm worried about you!"

    Then a car pulled up beside me. Hanging out of the window was my dad. Beside him, smiling gently, sat my mom. And that's when I started laughing. I laughed so hard that I cried. Despite my best efforts to run away from home, my father finally managed to track me down. I couldn't leave now, not with him sitting there with caring eyes.

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