衡量组织兴奋性高低最常用的指标是

衡量组织兴奋性高低最常用的指标是A.阈电位 B.阈强度 C.刺激时间 D.刺激频率 E.刺激强度变化率

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第47题应填__________

第47题应填__________A.after B.before C.first D.later

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According to the passage, forgers are usually sold to_______

According to the passage, forgers are usually sold to_________A.experts B.person

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Why wouldn' t Uncle Smith come on Saturday?

Why wouldn' t Uncle Smith come on Saturday?A.He only wanted to come on Sunday. B

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