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    ---- Please! ----This is Johnson.Could someone please come to 123 Hall Street? My house has been broken into. A.What can I do for you? B.Morning! C.Paschal Police Station D.I’m Paschal Police Station 【查看更多】

     

    题目列表(包括答案和解析)

    阅读下列短文，从每题所给的（A、B、C和D）四个选项中，选出最佳选项。

    Vitamin Supplements:More May Be Too Much

    　　Vitamins are meant to improve people's anti- disease systems，and with the spread of SARS and bind flu，many Chinese are taking vitamins A,C,and E every day．

    　　But some US researchers say that vitamin supplements（补充）cannot correct a poor diet，and that multivitamins havenot been shown to prevent any disease．It is also easy for highdoses（剂量）of certain vitamins and minerals to increase therisk of disease actually．

    　　Experts say they are no longer concerned about the lackof vitamin．Those are almost unheard of today,even with thepopulation eating fewer fruits and vegetables．Instead，theconcern is with the dangers of vitamin excess（过量）．

    　　Dr Beniamin Caballero,a member of the Food and Nutrtion Board at the US National Academy of Sciences,said thatfor some supplements,including vitamin A,the difference between the advised dose and the dose that could lead to diseaselike osteoporosis(bone disease)was not large．Popular multi-vitamins he added,often contain what could be risky dose．

    　　Similar questions are being raised ahout other vitamins and minerals,particularly iron and vitamins E and C．

    　　Researchers say the questions involve multivitamins taken by healthy people,not particular vitamins or minerals taken by groups with special needs．Some elderly people,for exam ple,may lack B12 because they lose their ability to absorb itfrom foods．People who spend little time outdoors may require vitamin D,which the skin makes when it is exposed to sunlight．Even when older people are in the sun,aging skin loses much of itS ability to create the vitamin．

    　　“If you eat a poor diet every day,vitamins are the least of your many problems,”said Dr Caballero．“You cannot replace a healthy diet．People are looking for the magic bullet which doesn't exist．”

    (1)

    From the second paragraph,we can find that ________

    [　　]

    A．

    parents should prevent their children from taking vitamins

    B．

    doctors shouldn't use any vitamins on their patients

    C．

    too much vitamins can increase the risk of disease

    D．

    high dose of certain vitamins can prevent diseases

    (2)

    What do US experts mean in the third paragraph

    [　　]

    A．

    People usually have unhealthy diet．

    B．

    People usually lead a hard life．

    C．

    People seldom lack vitamins nowadays．

    D．

    People seldom suffer from disease．

    (3)

    Vitamin A,as Dr Benjamin Caballero described in the fourth paragraph,________

    [　　]

    A．

    is dangerous for people to take

    B．

    is very useful to bone disease

    C．

    should be taken with care

    D．

    should be taken by a large amount

    (4)

    The writer of this passage seems to suggest that we should________

    [　　]

    A．

    have poor diets every day

    B．

    have a healthy diet every day

    C．

    try to find the magic vitamins

    D．

    take some vitamins every day

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    It was in August of 2009 _________ the typhoon Morakot severely struck Taiwan, causing hundreds of peo-ple dead, missing and injured．

    [　　]

    A．which

    B．when

    C．that

    D．what

    查看答案和解析>>

    阅读理解

    　　More than seven hundred years ago, the Prince of Wales had a very big and brave dog called Gelert．One day the Prince wanted to go hunt-ing with his men．He told his dog to stay at home and look after his baby son．The baby was in a wooden cradle, which was like a small bed．When the Prince came back from hunt-ing, Gelert ran out to meet his master．He wagged his tail and jumped up to put his paws on the Prince's chest．Then the Prince saw the blood on Gelert's jaws and head．

    　　"What have you done?" the Prince said．He rushed into his house and looked for his baby son．The cradle was lying on its side on the floor．The clothes were torn and there was blood on them．

    　　"So you have killed my son?" the Prince said angrily．"You unfaithful dog!" He took out his sword and killed the dog．Just as Gelert was dying, he managed to bark．Then the Prince heard a baby call to the dog．

    　　The Prince ran out of the house and saw his son lying on the ground unhurt．Near him was a dead wolf．Then the Prince knew that Gelert had defended the baby and killed the wolf．

    　　The Prince ran back into the house but he was too late．Gelert was dead．The Prince was very sad indeed．Tears ran down his face when he realized 'he had killed his faith-ful friend．The Prince carried the body of his brave dog to the top of a mountain and buried him there．After this, the Prince never smiled again．Every morning at dawn, he walked up the mountain and stood by the dog's grave for a few minutes．

    　　If you go to Mount Snowdon in Wales, people will show you where Gelert is buried．There is a sign by his grave．It reminds peo-ple of a brave and faithful dog．

    (1)

    Gelert was the dog of the Prince of _________．

    [　　]

    A．

    Scotland

    B．

    England

    C．

    Ireland

    D．

    Wales

    (2)

    The Prince told the dog to _________ when he was leaving．

    [　　]

    A．

    watch the door

    B．

    take care of his baby at home

    C．

    welcome his friends

    D．

    stop the strangers

    (3)

    The dog was very _________ when his master came back from hunting．

    [　　]

    A．

    glad

    B．

    fearful

    C．

    afraid

    D．

    tired

    (4)

    The Prince never smiled again because _________

    [　　]

    A．

    the wolf was killed by Gelert

    B．

    he had buried the dog on the top of mountain

    C．

    he had killed his faithful friend Gelert

    D．

    Gelert had killed his baby son

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    　　When a storm is coming, most people leave the area as quickly as possible and head for safety. But there are a few people who will get into their cars and go straight for the center of the storm. These people are willing to risk (冒……危险) being killed by floods or 100-kilometer-an-hour winds for the excitement of watching the storm close up.

    　　“Storm chasing (追逐) ” is becoming an increasingly popular hobby (喜好), especially in the Midwest of the United States, where there are frequent storms between March and July. A storm chaser begins the day by checking the Internet for the latest weather reports, and then drives up to 1 000 kilometers to where the storm will be and waits for it to develop.

    　　Although anyone can do it, storm chasing is extremely dangerous. The power of a big storm can throw a cow into the air or destroy a whole house in seconds. Storm chasers are also often hurt in accidents caused by driving in a heavy rain. If you are a beginner,it is much safer to join a group for storm-chasing vacations during the storm season.

    　　Even then, storm chasing is not all adventure and excitement. “Storm chasing is 95% driving, ” says Daniel Lynch, who spends most of his summer storm-chasing. “Sometimes you can sit around for hours waiting for something to happen, and all you get is blue sky and a few light showers. ”

    　　However, for storm chasers, it is all worth it. “When you get close to a storm, it is the most exciting sight you will ever see in your life, ”says Jasper Morley. “Every storm is an example of the power of nature. It is the greatest show on Earth. ”

    (1) For storm chasing, the first thing storm chasers do is to________.

    [　　]

    A．head straight for the center of the storm

    B．get into the car for safety

    C．wait patiently for the storm to develop

    D．collect information about a coming storm

    (2) Beginners of storm chasing are advised

    [　　]

    A．not do drive in a heavy rain

    B．to do it in an organized way

    C．not to get too close to a storm

    D．to spend more time on it in summer

    (3) By saying “it is all worth it” in the last paragraph, the author means that________.

    [　　]

    A．storm chasing costs a lot of money

    B．storm chasing is worth hours of wait-ing

    C．efforts in storm chasing are well paid

    D．a storm presents the greatest show on Earth

    (4) What can we learn from the text?

    [　　]

    A．Sometimes storm chasers get nothing but disappointment.

    B．Many storm chasers get killed in the storms.

    C．Storm chasing is becoming popular around the world

    D．Storm chasing is only fit for young peo-ple.

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