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[主观题]

药物的安全指数是指

A.ED50/LD50

B.LD5/ED95

C.ED5/L D95

D.LD50/ED50

E.LD95/ED5

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第1题

Parents can help the bullied child by way of telling him to show by his actions______.

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第2题

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第3题

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第4题

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第5题

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第6题

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第7题

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第8题

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第9题

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第10题

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