To live forever was the dream of many emperors in ancient China．People were ordered to call them Wansui，which means 10，000 years，but no human could live that long．How long can humans really live? According to the latest scientific discovery，humans are able to live up to the age of 120 or perhaps even longer．

    Several recent studies showed that our life span(寿命)can be extended(延长)far beyond normal limits．Cynthia Kenyon，a professor at the University of California in San Francisco doubled the life of a worm from two weeks to a month．By changing the function of a single gene，known as daf-2，the scientist not only added extra days to the worm’s life but also kept it a healthy as worms which were half its age．

    There are two similar genes in the bodies of mammals．By changing the function of on gene，scientists extended the life of a mouse by 1 8 per cent(or 4．5 months)．Another gene is called IGF-1．Researchers still don’t know how it affects our body．But by reducing its functions the life of a mouse increases by 33 per cent for 8．6 months)．The average life span of a mouse is 26 months．

    In the experiment of extending life，an ancient saying，“you are what you eat.” also seems to  be true．Vegetables contain fewer calories than meat，and help to prolong life，scientists say. Research has found that taking in fewer calories affects our lives in a similar way to reducing IGF-1．

    US biologist John Phelan suggests low calorie diets could increase human life span，but there is no proof yet．

    Researchers are still waiting for the results of a study started in 1987．Monkeys are fed with low calorie food to see what happens．A monkey’s typical life span is 40 years，so there is a little while to wait．

    In China，average，life expectancy(预期寿命)has now reached 70，double that of 1949. Increasing the length of our lives may bring us closer to the dreams of our ancient emperors．But it may also cause social problems such as housing and employment，social scientists have warned．

57．Which of the following is TRUE about statement of life span?

      A．A few emperors in ancient China could live up to 10，000 years．

      B．Creatures aren’t able to lives up to 120 years．

      C．The dream of living forever is coming true．

      D．In China，the average life span is twice as long as it was half a century ago．

58．What can we learn from paragraph 37

      A．A mouse is able to live up to two years and a half．

      B．A mouse can live for 34．6 months by reducing its gene．

      C．Scientists are trying to work out how the IGF-1 gene affects our body．

      D．The two similar genes have the same functions in the bodies of animals．

59．In paragraph 4，“you are what you eat,”probably means        

      A．the more you eat，the longer you will lives

      B．the better you eat，the greater IGF-l’s functions are

      C．the healthier food you eat，the healthier you are

      D．the fewer calories you take，the happier life you’ll live    

60．What is the main idea about this passage?

       A．We are able to live longer．

       B．The genes affect life span of human beings．

       C．A balanced diet prolongs our life．

       D．Extending life span has caused terrible social problems．

To switch or not to switch, that is the question．Google’s announcement of its Nexus One smartphone（智能手机） happened over a week ago and I’m still receiving lots of e-mails from readers asking the same question: Should they give up their iPhone for the Nexus One?

       Some people with iPhones, disappointed by American Telephone&Telegraph’s inadequate service and the high monthly cost, are wondering if they have really got something to replace it．Does the Nexus One offer the functions that Apple has led them to expect?

       I’m on the fence myself, even though I never thought I’d be interested in anything but the iPhone．From my experience using the Nexus One, and from talking to people who have made the change, it’s not necessarily about the differences between the iPhone and the Nexus One．The phones are extremely similar in design and general feel．Instead, the decision can be made based on the software（软件） services you use on your desktop．

       My friend Chad Dickerson received a pre-launch Nexus One from Google three weeks ago．He said Google’s phone feels connected to certain services on the Web in a way the iPhone doesn’t．“Compared to the iPhone, the Google phone feels like it’s part of the Internet to me,” he said．“If you live in a Google world, you have that world in your pocket in a way that’s cleaner and more connected than the iPhone．”

       Personally, the phones work perfectly with their own software, but both of them don’t make an effort to play well with other services．

Why are some iPhone users expecting a new type of phone?

     A．Because their old ones are out of date．

     B．Because they accept Google’s announcement．

     C．Because of the limited service and high cost．

     D．Because of the terrible software they can use．．

What’s the author’s attitude towards the new phones in the third paragraph?

       A．Negative       B．Neutral              C．Indifferent          D．Positive

In Chad Dickerson’s opinion, the Nexus One is ________ the iPhone．

     A．better than     B．worse than     C．as good as      D．as bad as

The best title of the passage might be ________．

       A．Apple’s New Smartphone             

       B．Torn Between Two Phones

      C．Good Services Matter     

       D．Google’s New Smartphone

To switch or not to switch, that is the question．Google’s announcement of its Nexus One smartphone（智能手机） happened over a week ago and I’m still receiving lots of e-mails from readers asking the same question: Should they give up their iPhone for the Nexus One?
Some people with iPhones, disappointed by American Telephone&Telegraph’s inadequate service and the high monthly cost, are wondering if they have really got something to replace it．Does the Nexus One offer the functions that Apple has led them to expect?
I’m on the fence myself, even though I never thought I’d be interested in anything but the iPhone．From my experience using the Nexus One, and from talking to people who have made the change, it’s not necessarily about the differences between the iPhone and the Nexus One．The phones are extremely similar in design and general feel．Instead, the decision can be made based on the software（软件） services you use on your desktop．
My friend Chad Dickerson received a pre-launch Nexus One from Google three weeks ago．He said Google’s phone feels connected to certain services on the Web in a way the iPhone doesn’t．“Compared to the iPhone, the Google phone feels like it’s part of the Internet to me,” he said．“If you live in a Google world, you have that world in your pocket in a way that’s cleaner and more connected than the iPhone．”
Personally, the phones work perfectly with their own software, but both of them don’t make an effort to play well with other services．
【小题1】Why are some iPhone users expecting a new type of phone?

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B. is the first product to manage one’s sleep

C. is free of medical risks????????????? ????????????? ????????????? ????????????? ?????????????

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To switch or not to switch, that is the question．Google’s announcement of its Nexus One smartphone（智能手机） happened over a week ago and I’m still receiving lots of e-mails from readers asking the same question: Should they give up their iPhone for the Nexus One?

Some people with iPhones, disappointed by American Telephone&Telegraph’s inadequate service and the high monthly cost, are wondering if they have really got something to replace it．Does the Nexus One offer the functions that Apple has led them to expect?

I’m on the fence myself, even though I never thought I’d be interested in anything but the iPhone．From my experience using the Nexus One, and from talking to people who have made the change, it’s not necessarily about the differences between the iPhone and the Nexus One．The phones are extremely similar in design and general feel．Instead, the decision can be made based on the software（软件） services you use on your desktop．

My friend Chad Dickerson received a pre-launch Nexus One from Google three weeks ago．He said Google’s phone feels connected to certain services on the Web in a way the iPhone doesn’t．“Compared to the iPhone, the Google phone feels like it’s part of the Internet to me,” he said．“If you live in a Google world, you have that world in your pocket in a way that’s cleaner and more connected than the iPhone．”

Personally, the phones work perfectly with their own software, but both of them don’t make an effort to play well with other services．

1.Why are some iPhone users expecting a new type of phone?

2.What’s the author’s attitude towards the new phones in the third paragraph?

3.In Chad Dickerson’s opinion, the Nexus One is ________ the iPhone．

4.The best title of the passage might be ________．