Vitamins are similar because they are made of the same elements—usually carbon,hydrogen,oxygen,and sometimes nitrogen.They are different in that their elements are arranged differently,and each vitamin been（ ）one or more specific functions in the body. A.holds B.plays C.performs

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Vitamins are similar because they are made of the same elements—usually carbon,hydrogen,oxygen,and sometimes nitrogen.They are different in that their elements are arranged differently,and each vitamin been（ ）one or more specific functions in the body.A.holdsB.playsC.performs

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These two areas are similar ________ they both have a high rainfall during this season.

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Though techniques such as shading, crosshatching, screening or similar means are recommended, the use of color is permissible.

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Main bearings for medium speed engines currently in use are of the ____ type, Similar bearing shells are employed for bottom end bearings

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Compare this with what happens in the mass production of poultry:there are battery farms,for example,where thousands of chickens live crowded together in one building and are fed on food which is little better than rubbish.Chickens kept in this way are not only tastel ess asfood;they also（ ）eggs which lack important vitamins.

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