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Some exercises such as calisthenics, running, or to swim involve producing muscle tension through range of movements that are called isotonics.

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Two unique features of the Arctic they are lack of precipitation and the permanently frozen ground

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This will have some serious effect about agriculture

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Muscles are essentially made up by elastic fibers that  lend the flexibility to our body.

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I didn’t think it was you. Your voice sounded ____________on the phone.

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Science and technology are part of the knowledges

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The purpose of traveler’s checks is to protect travelers from theft and accidental a lot of money.

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Bells told people of happy vents, such as weddings and born , sometimes had to announce unpleasant times such as death.

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The basic elements of opinion research are interviewers, questionnaires, tabulating equipment, and to sample population

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Comet are discovered each year, but few of them are bright enough to be seen without aid of magnification.

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Until recently, women were forbidden by law owning property.

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Jim didn’t have a house and a car, for he was jobless for long time

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My father used to _____ me to the zoo when we _____ in the city.

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You can do any job. The only condition is that you have the right qualifications for it.

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Gunpowder, in any ways the most effective of all the explosive materials, were mixture of potassium nitrate, charcoal, and sulfuric

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There has been a hot debate among the scientists relating to the pros and cons of using robotic probes to study distant objects in space.

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Depth cratered, moon is over 2100 miles in diameter with negligible gravity and atmosphere.

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Most of the magnesium used in United States comes from the sea water.

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Some snakes have hollow teeth are called fangs that they use to poison themselves victim

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Jack London, whom was known for his stories of Alaska, lived there during the Klondike g-rush

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People believe that he is a kind doctor.