练习册

  • 练习册
  • 试题
    Sum up the results of their discussion. StepⅤ. Consolidation Do some exercises using we learned this class. Homework: 【查看更多】

     

    题目列表(包括答案和解析)

    阅读理解

    　　You are probably familiar with the saying：An apple a day keeps the doctor away．A recent research carried out by the Chinese University of Hong Kong may change the saying：

    　　An apple a day may keep aging away．

    　　The research chose fruit flies(果蝇), as they share many genes(基因)with humans．The fruit flies were either fed normally or had an apple extract(浓缩物)added to their diet．

    　　It turned out that those fruit flies that were given apple extract lived about 55 days－five days longer than the flies that were normally fed．The research group also found it easier for the flies to walk，climb and move about as they aged．

    　　According to the result, the researchers believed that the antioxidants(抗氧化剂)in the apple extract helped clean up dangerous chemicals(化学物质)that cause illnesses，as well as aging．

    　　In another study，researchers examined diets of thousands of women．They discovered that those who regularly ate apples were 20 percent less likely to suffer heart illnesses and stroke．

    　　The apples’ genetic code(遗传密码)was discovered recently．It allows scientists to develop nicer and healthier fruits．Researchers are already using the information to grow a kind of apples full of antioxidants that can keep eyes and joints healthy and protect humans against heart illnesses and cancer．

    　　Apples that kill the desire(欲望)to eat could also be produced, with the first “extra-healthy’’ apples on supermarket shelves within just four or five years．

    　　The team that keeps studying apple DNA includes 100 scientists from five countries．Their research also suggests that around 65 million years ago, when dinosaurs began to die off the plant，which would finally become today’s apple tree, experienced a great genetic change．The number of many of its genes doubled．The extra genes allowed the apple to get used to worse conditions and go through a different development from peaches，strawberries and other related fruits．

    (1)

    Why were fruit flies used for the research?

    [　　]

    A．

    Because they have a similar diet to humans．

    B．

    Because they have a history as long as apples．

    C．

    Because they share a lot of genes with humans．

    D．

    Because they feed on nothing but apple extract．

    (2)

    What result did the researchers find out?

    [　　]

    A．

    Apples produce chemicals that can change human genes．

    B．

    Apples have antioxidants that kill chemicals that cause aging．

    C．

    Apples are rich in vitamins that are needed in humans’bodies．

    D．

    Apples produce chemicals that make apples taste more delicious．

    (3)

    What happened to apples around 65 million years ago according to the research?

    [　　]

    A．

    Their genes stopped their development as the environment got worse．

    B．

    Their genes became twice in number but they finally died off like dinosaurs．

    C．

    They experienced a great genetic change making them used to worse conditions．

    D．

    They went through a similar development to peaches, strawberries and other related fruits．

    (4)

    What can we infer(推断)from the passage?

    [　　]

    A．

    Eating apples may bring us more advantages than we might believe before．

    B．

    People who have the habit of eating apples don’t need to see a doctor．

    C．

    Apples that kill the desire to eat are already available in supermarkets now．

    D．

    People will eat apples instead of peaches and strawberries from now on．

    查看答案和解析>>

    读一读以下这篇关于兵马俑的文章，然后回答文后的问题。

    　　In the spring of 1974, Chinese archaeologists(考古学家)made a great find in Xi'an, Shanxi Province, when they unearthed(挖掘；挖出)the pottery statues of imperial(帝国的；皇帝的)guards buried in the Tomb(坟墓)of the First Emperor of the Qin Dynasty over 2,000 years ago．The pit consists of more than seven thousand pottery warriors, horses and wooden chariots(双轮战车)in life size．The arms they hold are altogether real, and some of the swords are still very sharp．The news of the findings spread far and wide．In the past years it attracted tens of thousands of visitors including foreigners, overseas Chinese and compatriots(同胞)from all over the world to Xi'an, which boasts of having been the capital of several dynasties by the name of Chang'an since ancient times．

    　　The pottery army is well worth a visit．All the pottery warriors and horses are so vivid and lifelike that you could almost feel them breathing．Obviously the craftsmen in the Qin Dynasty were very skillful．Their skills had reached the highest level．Many foreign visitors admire and praise them as a wonder．The former French Premier spoke highly of them．“There have been seven wonders of the world：now the Pottery Army in Qin Tomb is to be added,”he said,“Not to see the pyramids is not to see Egypt at all, while not to see the Pottery Army is not to see China at all．”His words admirably(令人钦佩地)sum up the impressions of all who have seen this wonder of China and of all the world．

    1．What did the Chinese archaeologists unearth at the Tomb of the First Emperor of the Qin Dynasty over 2,000 years ago?

    ________________

    2．How many pottery warriors, horses and wooden chariots are there in the pit and what size are they?

    ________________

    3．By what name had Xi'an been the capital of several dynasties since ancient times?

    ________________

    4．Translate the underlined sentence in Paragraph 2．

    ________________

    5．How many wonders are there according to the former French Premier's words?

    ________________

    查看答案和解析>>

    阅读理解

    　　When some plates of the earth move suddenly, an earthquake happens．Many earthquakes begin under the sea．Earthquakes may happen anywhere on the earth．They often happen near the mountains．

    　　During an earthquake, the shakings make rocks rise suddenly and even crack(断裂)open．Houses fall, people are killed or hurt, and sometimes the whole villages or cities are destroyed．

    　　Can we do something to keep ourselves safe from earthquakes? Scientists have studied earthquakes and make maps that show the “earthquake belts”．In areas(地区)in these belts, it’s possible for earthquakes to happen．In these areas we should build strong houses to fight against earthquakes．

    　　In the future, scientists will be able to tell when and where an earthquake will be before they happen．They can also tell people what to do and how to do it．

    (1)

    A large number of earthquakes often happens ________．

    [　　]

    A．

    in the area

    B．

    on land

    C．

    at night

    D．

    next to mountains

    (2)

    The reason for an earthquake is ________．

    [　　]

    A．

    the result of rock plate sudden movement

    B．

    that there are so many plates on the earth

    C．

    that the sea is too deep

    D．

    rocks’ cracking open

    (3)

    A map showing the earthquake belts will tell people ________．

    [　　]

    A．

    what kind of houses to build

    B．

    what kind of houses can stay up in an earthquake

    C．

    where earthquake may happen

    D．

    how to keep themselves safe during an earthquake

    (4)

    In the future we’ll be no longer so afraid of earthquakes ________．

    [　　]

    A．

    with the help of scientists’ exact prediction(预报)

    B．

    because of a map showing the “earthquake belts”

    C．

    because we can guess the date and place of earthquakes

    D．

    as scientists know what to do and how to do it

    (5)

    Choose the best title fro the passage．

    [　　]

    A．

    An Earthquake

    B．

    A Scientist and an Earthquake

    C．

    How to Fight Against Earthquake

    D．

    Earthquakes Today and Tomorrow

    查看答案和解析>>

    阅读理解

    　　You are probably familiar with the saying：An apple a day keeps the doctor away．A recent research carried out by the Chinese University of Hong Kong may change the saying：

    　　An apple a day may keep aging away．

    　　The research chose fruit flies(果蝇), as they share many genes(基因)with humans．The fruit flies were either fed normally or had an apple extract(浓缩物)added to their diet．

    　　It turned out that those fruit flies that were given apple extract lived about 55 days－five days longer than the flies that were normally fed．The research group also found it easier for the flies to walk，climb and move about as they aged．

    　　According to the result, the researchers believed that the antioxidants(抗氧化剂)in the apple extract helped clean up dangerous chemicals(化学物质)that cause illnesses，as well as aging．

    　　In another study，researchers examined diets of thousands of women．They discovered that those who regularly ate apples were 20 percent less likely to suffer heart illnesses and stroke．

    　　The apples' genetic code(遗传密码)was discovered recently．It allows scientists to develop nicer and healthier fruits．Researchers are already using the information to grow a kind of apples full of antioxidants that can keep eyes and joints healthy and protect humans against heart illnesses and cancer．

    　　Apples that kill the desire(欲望)to eat could also be produced, with the first“extra-healthy''apples on supermarket shelves within just four or five years．

    　　The team that keeps studying apple DNA includes 100 scientists from five countries．Their research also suggests that around 65 million years ago, when dinosaurs began to die off the plant，which would finally become today's apple tree, experienced a great genetic change．The number of many of its genes doubled．The extra genes allowed the apple to get used to worse conditions and go through a different development from peaches，strawberries and other related fruits．

    (1)

    Why were fruit flies used for the research?

    [　　]

    A．

    Because they have a similar diet to humans．

    B．

    Because they have a history as long as apples．

    C．

    Because they share a lot of genes with humans．

    D．

    Because they feed on nothing but apple extract．

    (2)

    What result did the researchers find out?

    [　　]

    A．

    Apples produce chemicals that can change human genes．

    B．

    Apples have antioxidants that kill chemicals that cause aging．

    C．

    Apples are rich in vitamins that are needed in humans'bodies．

    D．

    Apples produce chemicals that make apples taste more delicious．

    (3)

    What happened to apples around 65 million years ago according to the research?

    [　　]

    A．

    Their genes stopped their development as the environment got worse．

    B．

    Their genes became twice in number but they finally died off like dinosaurs．

    C．

    They experienced a great genetic change making them used to worse conditions．

    D．

    They went through a similar development to peaches, strawberries and other related fruits．

    (4)

    What can we infer(推断)from the passage?

    [　　]

    A．

    Eating apples may bring us more advantages than we might believe before．

    B．

    People who have the habit of eating apples don't need to see a doctor．

    C．

    Apples that kill the desire to eat are already available in supermarkets now．

    D．

    People will eat apples instead of peaches and strawberries from now on．

    查看答案和解析>>

    阅读理解

    　　You are probably familiar with the saying：An apple a day keeps the doctor away．A recent research carried out by the Chinese University of Hong Kong may change the saying：

    　　An apple a day may keep aging away．

    　　The research chose fruit flies(果蝇), as they share many genes(基因)with humans．The fruit flies were either fed normally or had an apple extract(浓缩物) added to their diet．

    　　It turned out that those fruit flies that were given apple extract lived about 55 days－five days longer than the flies that were normally fed．The research group also found it easier for the flies to walk，climb and move about as they aged．

    　　According to the result, the researchers believed that the antioxidants(抗氧化剂) in the apple extract helped clean up dangerous chemicals(化学物质) that cause illnesses，as well as aging．

    　　In another study，researchers examined diets of thousands of women．They discovered that those who regularly ate apples were 20 percent less likely to suffer heart illnesses and stroke．

    　　The apples' genetic code(遗传密码) was discovered recently．It allows scientists to develop nicer and healthier fruits．Researchers are already using the information to grow a kind of apples full of antioxidants that can keep eyes and joints healthy and protect humans against heart illnesses and cancer．

    　　Apples that kill the desire(欲望) to eat could also be produced, with the first“extra-healthy''apples on supermarket shelves within just four or five years．

    　　The team that keeps studying apple DNA includes 100 scientists from five countries．Their research also suggests that around 65 million years ago, when dinosaurs began to die off the plant，which would finally become today's apple tree, experienced a great genetic change．The number of many of its genes doubled．The extra genes allowed the apple to get used to worse conditions and go through a different development from peaches，strawberries and other related fruits．

    (1)

    Why were fruit flies used for the research?

    [　　]

    A．

    Because they have a similar diet to humans．

    B．

    Because they have a history as long as apples．

    C．

    Because they share a lot of genes with humans．

    D．

    Because they feed on nothing but apple extract．

    (2)

    What result did the researchers find out?

    [　　]

    A．

    Apples produce chemicals that can change human genes．

    B．

    Apples have antioxidants that kill chemicals that cause aging．

    C．

    Apples are rich in vitamins that are needed in humans'bodies．

    D．

    Apples produce chemicals that make apples taste more delicious．

    (3)

    What happened to apples around 65 million years ago according to the research?

    [　　]

    A．

    Their genes stopped their development as the environment got worse．

    B．

    Their genes became twice in number but they finally died off like dinosaurs．

    C．

    They experienced a great genetic change making them used to worse conditions．

    D．

    They went through a similar development to peaches, strawberries and other related fruits．

    (4)

    What can we infer(推断)from the passage?

    [　　]

    A．

    Eating apples may bring us more advantages than we might believe before．

    B．

    People who have the habit of eating apples don't need to see a doctor．

    C．

    Apples that kill the desire to eat are already available in supermarkets now．

    D．

    People will eat apples instead of peaches and strawberries from now on．

    查看答案和解析>>


    同步练习册答案