题目内容

【题目】概要写作

阅读下面短文,根据其内容写一篇60词左右的内容概要。

With global warming and melting ice, it isn’t easy being a polar bear anymore. Some studies have predicted that polar bears could die out by the end of the century. The good news is not all researchers think the bears are absolutely disappearing. Scientists at the American Museum of Natural History(AMNH) have published a new paper indicating that things might not be as bad for polar bears as some scientists expect.

To understand the reason for the researchers’ cautious optimism, we must first understand the factors that are threatening the polar bear’s existence. Polar bears consume a diet of mainly young seals. In order to hunt these seals, polar bears need to rest at the top of sea ice---the same ice that is increasingly melting for most of the year thanks to climate change. In another 50 years, experts expect that the Arctic will be too warm for sea ice to form for half of the year, leaving polar bears without a reliable food source and in serious danger of starvation.

As it turns out, alternative food sources for the polar bears aren’t completely out of the question. For as long as biologists have tailed after the animals, they’ve seen polar bears eating animals found on land like caribou(驯鹿) and snow geese---as well as the snow geese’s eggs.

Can polar bears actually survive off these alternative food sources for long periods of time? To figure this out, researchers calculated the nutrients that a caribou and snow geese diet would provide. They found that even adult male polar bears would be able to obtain more calories than they would burn in hunting these meals. Moreover, the food would provide the food necessary to avoid starvation during the summer months.

Unfortunately, not all polar bears have tended to seek food on land. That said, the researchers expect that necessity would push more polar bears to hunt on land to avoid starvation. They also expect that the bears could learn from their fellow bears how to hunt on land until the practice becomes second nature.

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【答案】With global warming and melting ice, some scientists think that polar bears could die out by the end of the century. However, other scientists disagree. They have found polar bears have found alternative food sources and they can survive by hunting animals on land instead of seals. Besides, the researchers expect more polar bears learn how to hunt on land to avoid starvation.

【解析】试题分析:题目要求根据所给内容,写一篇60词左右的内容概要。题目主要考查学生把握文章主旨大意和段落大意的能力以及总结概括能力。熟练掌握从句、非谓语动词等语法知识,对遣词造句也有很大帮助。

亮点说明:参考答案的前两句是对文章主旨大意的概括,后两句是对第二三四段的总结。北极熊找到了新的食物,但并非所有的北极熊都会去陆地上捕猎。为了避免饿死,这是北极熊应该学会的。

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【题目】One in five people carry a ‘smart gene’ variant(变体)linked to long lifespan, bigger forebrains and enhanced mental ability, researchers have found.

'We've known for a long time that people lose cognitive(认知) abilities as they age, but now we're beginning to understand that factors like KLOTHO can give people a boost in aging. Genetic variation in KLOTHO could help us predict brain health and find ways to protect people from the diseases that happen to us as we grow old, like Alzheimer’s disease(老年痴呆症),” said senior author, Dena Dubal of University of California.

The KLOTHO gene affects a protein found in the kidneys and the brain that regulates many different body processes. About one in five people carry a single copy of the varian, known as KL-VS,which boosts levels of the protein and is associated with a longer lifespan and improved heart and kidney function. A small minority, 3% of the population, has two copies, which is linked to a shorter lifespan.

In the new study scientists scanned the brains of 422 men and women aged 53 and over who were also tested for the KLOTHO gene. They found that participants with a single copy of the gene variant also had a larger brain region known as RDLPFC, which is especially likely to shrink with age. Loss of neurons in this area may be one reason why older people are sometimes easily distracted and find it difficult to do more than one task at the same time.

Researcher Dr Jennifer Yokoyama said, The brain region enhanced by genetic variation in KLOTHO is vulnerable(脆弱的)in aging and some mental disease. In this case, bigger size means better function. It will be important to determine whether the structure increase associated with carrying one copy of KL-VS can offset the cognitive shortage caused by disease.”

People who have one copy of a variant KL-VS tend to live longer and have lower chances of suffering a stroke (中风),whereas people who have two copies may live shorter lives and have a higher risk of stroke.

【1】 What can we learn from the second paragraph?

A. People’s cognitive abilities do not decline if people have KLOTHO

B. With the clear understanding of KLOTHO, Alzheimer’s disease can be cured now.

C. Genetic variation in KLOTHO could be helpful in treating mental disease in elderly people

D. Genetic variation in KLOTHO could lead people to suffer from Alzheimer’s disease

【2】If a person carries two copies of the gene variant, he/she may _______

A. have better kidney funtciton

B. have a shorter lifespan

C. have a higher level of the protein in his/her body

D. suffer from some cognitive disease

【3】The reason why older people’s attention is easily distracted may be that _______.

A. they have fewer neurons in the RDLPEC

B. their brain region is too large

C. they have two copies of the gene variant

D. they have more neurons in the RDLPEC

4What does the underlined word “offset” in Paragraph 5 probably mean?

A. Prevent

B. Balance

C. Keep

D. Promote

【题目】根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。有两项为多余选项。

Weight loss is a hard topic. Lots of people aren’t satisfied with their present weight,but most people aren’t sure how to change it. You may want to look like the models or actors in magazines or on TV,but those goals might not be healthy or realistic for you. 【1】 So what should you do about your weight control?

2 The best way to find out if you are at a healthy weight or if you need to lose or gain weight is to talk to a doctor or a dietitian(营养学家). 3 If it turns out that you can benefit from weight loss , then you can follow a few of the simple suggestions listed below to get started.

4 People who lose weight quickly by crash dieting or other extreme measures usually gain back all of the pounds they lost,because they haven’t permanently(永久地) changed their habits. Therefore,the best weight management ways are those that you can maintain(保持)for a lifetime.

Small changes are a lot easier to stick with(坚持) than large ones. Try reducing the size of what you eat. 5 Once you have that done,start gradually introducing healthier foods and exercise into your life.

It’s a good idea to maintain a healthy weight because it’s just that:healthy.

A. Try giving up regular soda for a week.

B. Weight management is about long-term success.

C. Try to pay attention as you eat and stop when you’re full.

D. Besides,no magical diet will make you look like someone else.

E. Changing from whole to nonfat or low-fat milk is also a good idea.

F. Being healthy is really about being at a weight that is right for you.

G. They will compare your weight with healthy standards and help you set goals.

【题目】根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

●Does failure really exist?

If you believe you have failed, then you have.If you believe you don’t have the ability to succeed, then you don’t.__【1】_ The moment you decide to give up or stop working toward your goals, failure is born.

__2__

Most people give themselves an out without even realizing it.They are willing to work hard on reaching their goals, but only until the going gets too rough or their energy dies down. Don’t do that! __3__Never quit, never admit failure, and never lose heart.

●Don’t believe in a clear finish line for goals.

It’s a good idea to set a general timeline, but remember that something will be beyond your control.__4___If you lock yourself into a given timeline, you might make yourself feel like a failure! Instead, get a general idea of when you’d like your goal to be completed. Then take it one day at a time and focus on making progress instead of reaching the finish line in as little time as possible.

●Be sure that you don’t see difficulties as failures.

Difficulties mean only one thing: it’s not time for your goal to be completed yet.That’s it! It doesn’t mean you failed; it doesn’t mean you’re weak; it doesn’t mean you’ll never achieve your goals.__5__ You’ve got to keep moving forward and find a way over, around, or through the difficulties.

A. Never give up on yourself.

B. Failure only exists in your own mind!

C. That’s exactly how failure makes us feel.

D. It simply means you have not done enough yet.

E. You can never say exactly when your goal will be reached.

F. Instead, make up your mind to make your goal happen, no matter what!

G. Work hard towards your goal, and you will be likely to get good results.

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