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Most Polar seals retreat open water during the winter, but a few types have learn to (survive on and under the ice all year round .

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As a child grows on, its physical health is affected by few elements in the air, water and food

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Algebra is the branch of mathematics concerned with operations on sets of numbers or other elements that are often represented a symbols.

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The discovery of the antibiotic penicillin in 1928 has not produced antibiotics useful for treating of infectious diseases until 1940.

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The Americans annually import more than $3 billion worthy of Italian clothe, jewelry, shoes.

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In its pure State, aluminum is a weak metal, but when combined elements such as copper or magnesium, it is formed alloys great strength

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He has been hoped for a raise for the last four months, but his boss is reluctant to give one .

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Because of the latest forecast , the tunnel will be finished next year.

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The majestic Rock Mountains stretch each way from Mexico to the Arctic.

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Sheep have been domesticated for over 5,000 years ago

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AIDS can be transmitted practicing unsafe sex and receive tainted blood from one that is already infected.

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No one would have attended the lecture if you told the truth about gue speaker.

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The direct (sources of water lakes are rain, melted snowy and ice

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Because of it consists only of a relatively strand of DNA protected by a shell of Protein, the virus cannot eat or reproduce by itself.

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Usually the climate mountainous area become much windy at higher altitudes

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Most countries depend to few extent on cereal imports aurgment their own crops

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No matter what different, various music types have one thing in common: touching the ears of the listeners.

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It is difficult to get used to sleep in a tent after having soft comfortable bed lie.

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Each of the nurse report to operating room when his or her name is called

Body language _____communication effectively.

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Electric lamps came into widespread use during early 1900’s and have replaced other type of fat gas, oil lamps for almost every purpose.