【单选题】【消耗次数：1】
下列情况需要输血的是（ ）
①
急性失血量达总血容量的5%时
②
急性失血量达总血容量的10%时
③
急性失血量达总血容量的20%时
④
慢性失血血红蛋白较正常下降20%时
⑤
慢性失血血红蛋白较正常下降30%时
参考答案：
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相关题目
【单选题】
正常成年男性红细胞、血红蛋白、白细胞的正常参考值的描述，下列哪项是正确
①
（3.5-5.0）×109、110-150g/L、4-10×109
②
（4.0-5.0）×109、110-150g/L、4-10×109
③
（4.0-5.0）×109、120-160g/L、4-10×109
④
（4.0-5.5）×109、120-160g/L、4-10×109
⑤
（4.0-5.5）×109、110-160g/L、4-10×109
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The sight of the fruit salad made our daughter Kit’s mouth _____.
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wet
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water
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soak
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The old lady _____and fell from the top of the stairs to the bottom.
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slided
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slipped
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split
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spilled
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She put an extra blanket over the baby for fear that _____.
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he catches cold
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he should catch cold
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he caught cold
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counted for
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looked up
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accounted for
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breaking
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be breaking
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had they been done
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矛盾同一性在事物发展中的作用表现是什么？
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矛盾双方在相互依存中得到发展
②
矛盾双方相互吸取有利于自身发展的因素
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调和矛盾双方的对立
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