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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

    Anxiety has now surpassed depression as the most common mental health disease among college students, though depression, too, is on the rise. More than half of students visiting campus clinics cite anxiety as a health concern, according to a recent study of more than 100,000 students nationwide by the Center for Collegiate Mental Health at Penn State. Nearly one in six college students has been diagnosed with or treated for anxiety within the last 12 months, according to the annual national survey by the American College Health Association.

    The causes range widely, experts say, from mounting academic pressure at earlier ages to overprotective parents to engagement with social media. Anxiety has always played a role in the development of a student's life, but now more students experience anxiety so acute that they are seeking professional help. Like many college clinics, the Center for Counseling and Psychological Services at the University of Central Florida (UCF)— one of the country's largest and fastest-growing universities, has seen sharp increases in the number of clients: 15.2 percent over last year alone.

    Anxiety has become characteristic of the current generation of college students, said Dan Jones, the director of Counseling and Psychological Services at Appalachian State University in Boone, N. C. Because of increasingly pressures during high school, he and other experts say, students arrive at college preloaded with stress. Accustomed to extreme parental oversight, many seem unable to govern themselves. And with parents so accessible, students have had less incentive to develop life skills. “They can't tolerate discomfort or having to struggle,” Dr Jones said.

    More often, anxiety is mild and temporary, the indication of a student under the control of a normal developmental issue-learning time management, for example, or how to handle rejection from a sorority. Mild anxiety is often treatable with early, modest interventions. But to care for rising numbers of severely troubled students, many counseling centers have moved to triage protocols (分诊措施). That means that students with less urgent needs may wait several weeks for first appointments.

    Like many college counseling centers, UCF has designed a variety of daily workshops and therapy groups that implicitly and explicitly address anxiety, depression and their triggers. Next fall the center will test a new app for treating anxiety with a seven-module cognitive behavioral program, accessible through a student's phone and augmented with brief videoconferences with a therapist. It also offers semester-long, 90-minute weekly therapy groups, such as “Keeping Calm and in Control”, “Mindfulness for Depression” and “Building Social Confidence” -for students struggling with social anxiety.

阅读理解

    My dad loved pennies, especially those with the elegant stalk of wheat curving around each side of the ONE CENT on the back. Those were the pennies he grew up with during the Depression (大萧条).

    As a kid, I would go for walks with Dad, spying coins along the way—a penny here, a dime (一角硬币) there. Whenever I picked up a penny, he'd ask, "Is it a wheat?" It always thrilled him when we found one of those special coins produced between 1909 and 1958, the year of my birth.

    One gray Sunday morning in winter, not long after my father's death in 2002, I was walking down Fifth Avenue, feeling bereft. I found myself in front of the church where Dad once worked. I was warmly shown in and led to a seat. Hearing Dad's favorite "A Mighty Fortress Is Our God", I burst into tears. We'd sung that at his funeral. After the service, I shook the pastor's hand and stepped onto the sidewalk—and there was a penny. I bent to pick it up, turned it over, and sure enough, it was a wheat. A 1944, a year my father was serving on a ship in the South Pacific.

    That started it. Suddenly wheat pennies began turning up on the sidewalks of New York everywhere. I got most of the important years: his birth year, my mom's birth year, the year he graduated from college, the year he met my mom, the year they got married, the year my sister was born. But alas, no 1958 wheat penny—my year, the last year they were made.

    The next Sunday, after the service, I was walking up Fifth Avenue and spotted a penny in the middle of a crossing. Oh, no, it was a busy street; cabs were speeding by—should I risk it? I just had to get it.

    A wheat! But the penny was worn, and I couldn't read the date. On arriving home, I took out my glasses and took it to the light. There was my birthday!

    I found 21 wheat pennies on the streets of Manhattan in the year after my father died, and I don't think that's a coincidence.

阅读理解

    A thief entered the bedroom of the 30th President of the United States, who met him and helped him escape punishment.

    The event happened in the early rooming hours in one of the first days when Calvin Coolidge came into power, late in August, 1923. He and his family were living in the same third­floor suite (套房) at the Willard Hotel in Washington that they had occupied several years before. The former President's wife was still living in the White House.

    Coolidge awoke to see a stranger go through his clothes, remove a wallet and a watch chain.

    Coolidge spoke, “I wish you wouldn't take that.”

    The thief, gaining his voice, said, “Why?”

    “I don't mean the watch and chain, only the charm (表坠). Take it near the window and read what is impressed on its back.” the President said.

    The thief read, “Presented to Calvin Coolidge.”

    “Are you President Coolidge?” he asked.

    The President answered, “Yes, and the House of Representatives (众议院) gave me that watch charm. I'm fond of it. It would do you no good. You want money. Let's talk this over.”

    Holding up the wallet, the young man said in a low voice, “I'll take this and leave everything else.”

    Coolidge, knowing there was $80 in it, persuaded the young man to sit down and talk. He told the President he and his college roommate had overspent during their holiday and did not have enough money to pay their hotel bill.

    Coolidge decided to offer the man and his roommate two rail tickets back to the college. Then he counted out $32 and said it was a loan (借款).

    He then told the young man, “There is a guard in the corridor.” The young man nodded and left through the same window as he had entered.

阅读理解

    My motivation for starting our family tradition of reading in the car was purely selfish: I could not bear listening to A Sesame Street Christmas for another 10 hours. My three children had been addicted to this cassette(磁带)on our previous summer road trips.

    As I began to prepare for our next 500-mile car trip, I came across a book—Jim Trelease's—The Read Aloud Handbook. This could be the answer to my problem. I thought. So I put Roald Dahl's James and the Giant Peach into my bag. When I began to read aloud the tale of the boy who escapes the bad guys by hiding inside a giant peach, my three kids argued and fought with each other in their seats. But after several lines, they were attracted into the rhythm of the words and began to listen.

    We soon learned that the simple pleasure of listening to a well-written book makes the long miles pas more quickly. Sometimes reading became the most interesting part of the trip. I read Wilson Rawls's Summer of the Monkeys as we spent two days driving to the beach. We arrived just behind the power crews restoring(恢复)electricity after a tropical storm. The rain continued most of the week, and the beach was covered with oil washed up by the storm. When we returned home, I asked my son what he liked about the trip. He answered without hesitation “The book you read in the car.”

    Road trips still offer challenges, even though my children now are teenagers. But we continue to read as we roll across the country. And I'm beginning to see that reading aloud has done more than help pass the time. For at least a little while, we are not shut in our own electronic worlds. And maybe we've started something that will pass on to the next generation.

阅读理解

    We talk a lot in the U.S. about success. Success is the dream and the end point. And not by coincidence the idea that hard work leads to personal success is as American as apple pie.

    But the reality is that sometimes we fail. And sometimes things, through no fault of our own, don't go our way. We're faced with a life-changing diagnosis (诊断), the passing of a loved one or job loss. We don't, as a society, have as much to say here.

    I think uncertainty does us all harm. We'd feel better equipped to deal with uncertainty if we talked about it more. I had so fully bought into the belief that with enough effort, I could control what happened in my life. I actually caught myself thinking I could "work my way out" of my cancer. As it turns out, cancer doesn't really care about one's work.

    We might also make wiser decisions — this isn't just a feel-good exercise. For example, technology and medicine have progressed to the point that many patients are living longer than they would have even a decade ago. These are achievements worth celebrating. And yet I wonder if the focus on success is sometimes misguided here as well. If it is one reason why we tend to pursue expensive end-of-life treatments, they often accomplish little other than to make a patient's final days painful and frightening. The fact is that, when asked, many patients would rather focus on living meaningfully in their final days.

    My hope here is to make a case for thinking about meaning, in the same way we think about pursuing success. In that spirit, I've asked several people, each of whom has met misfortune, how they find meaning in their lives. The diversity in their responses reflects the fact that there are no right or wrong answers here. We each can find meaning in different things.

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