什么叫嗅觉的阈值？嗅觉的特性是什么？影响嗅觉的因素有哪些？ 嗅觉阈值的分类
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\u55c5\u89c9\u9608\u503c\u6709\u611f\u89c9\u9608\u503c(\u4e5f\u53eb\u505a\u7edd\u5bf9\u9608\u503c)\u548c\u8bc6\u522b\u9608\u503c\u4e24\u79cd\u3002\u611f\u89c9\u9608\u503c\u662f\u867d\u7136\u4e0d\u77e5\u662f\u4ec0\u4e48\u6027\u8d28\u7684\u6c14\u5473\uff0c\u4f46\u53ef\u4ee5\u611f\u89c9\u5230\u6709\u6c14\u5473\u7684\u6700\u5c0f\u6d53\u5ea6\u3002\u8bc6\u522b\u9608\u503c\u662f\u53ef\u4ee5\u611f\u89c9\u5230\u662f\u4ec0\u4e48\u6c14\u5473\u7684\u6700\u5c0f\u6d53\u5ea6\u3002\u4e00\u822c\u540e\u8005\u603b\u662f\u9ad8\u4e8e\u524d\u8005\u3002\u5982\u6c28\u7684\u611f\u89c9\u9608\u503c\u4e3a0.1\uff0c\u8bc6\u522b\u9608\u503c\u4e3a0.6\uff1b\u786b\u5316\u6c22\u5206\u522b\u4e3a0.0005\u548c0.006\uff1b\u7532\u786b\u9187\u5206\u522b\u4e3a0.0001\u548c0.0007\u3002\u55c5\u89c9\u9608\u503c\u662f\u7814\u7a76\u548c\u8bc4\u4ef7\u6c14\u5473\u5e38\u7528\u7684\u6700\u91cd\u8981\u7684\u53c2\u6570\u3002
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