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Emergency vehicle lighting - Wikipedia
网页15 小时之前 — Red and blue emergency lights on a fire engine in Canberra, Australia. Emergency vehicle lighting, also known as simply emergency lighting or emergency lights, is a type of vehicle lighting used to visually announce a vehicle's presence to other road users. A sub-type of emergency vehicle equipment, emergency vehicle lighting is generally …
Animal cognition - Wikipedia
网页15 小时之前 — A crab-eating macaque using a stone tool to crack open a nut Experiments like the string-pulling task performed here by a Carib grackle provide insights into animal cognition.. Animal cognition encompasses the mental capacities of non-human animals, including insect cognition.The study of animal conditioning and learning used in this field …