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| Do you know | |
| 摘 要： | A dragonfly(蜻蜓)has a life span(跨度)of 24 hours.蜻蜓的生命跨度是24小时。A duck's quack doesn't echo(回声),and no one knows why.鸭子的嘎嘎声没有回声,没人知道是为什么。A goldfish has a memory span of three seconds.金鱼的记忆跨度是3秒钟。A shark(鲨鱼)is the only fish that can blink(眨眼)with both eyes.鲨鱼是可以用两只眼睛同时眨眼的唯一的一种鱼。Do you know… |
| 本文献已被 CNKI 等数据库收录！ | |