Sometimes people call each other “scaredy-cat”,but have you ever thought about this expression?When a cat is frightened,its heart starts beating faster,its muscles get tense,and there are changes in the chemicals in its blood-stream.Although the
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![Sometimes people call each other “scaredy-cat”,but have you ever thought about this expression?When a cat is frightened,its heart starts beating faster,its muscles get tense,and there are changes in the chemicals in its blood-stream.Although the](/uploads/image/z/7280816-32-6.jpg?t=Sometimes+people+call+each+other+%E2%80%9Cscaredy-cat%E2%80%9D%2Cbut+have+you+ever+thought+about+this+expression%3FWhen+a+cat+is+frightened%2Cits+heart+starts+beating+faster%2Cits+muscles+get+tense%2Cand+there+are+changes+in+the+chemicals+in+its+blood-stream.Although+the)
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