21.为了响应“健康重庆”的号召,小林和爸爸周末到郊外去钓鱼,他在亲近大自然的同时还观察到爸爸在钓鱼前要“试漂”来确定铅坠(铅坠由合金制成)的大小,尽量使“浮标”更灵敏(如图17甲
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![21.为了响应“健康重庆”的号召,小林和爸爸周末到郊外去钓鱼,他在亲近大自然的同时还观察到爸爸在钓鱼前要“试漂”来确定铅坠(铅坠由合金制成)的大小,尽量使“浮标”更灵敏(如图17甲](/uploads/image/z/1283328-0-8.jpg?t=21%EF%BC%8E%E4%B8%BA%E4%BA%86%E5%93%8D%E5%BA%94%E2%80%9C%E5%81%A5%E5%BA%B7%E9%87%8D%E5%BA%86%E2%80%9D%E7%9A%84%E5%8F%B7%E5%8F%AC%2C%E5%B0%8F%E6%9E%97%E5%92%8C%E7%88%B8%E7%88%B8%E5%91%A8%E6%9C%AB%E5%88%B0%E9%83%8A%E5%A4%96%E5%8E%BB%E9%92%93%E9%B1%BC%2C%E4%BB%96%E5%9C%A8%E4%BA%B2%E8%BF%91%E5%A4%A7%E8%87%AA%E7%84%B6%E7%9A%84%E5%90%8C%E6%97%B6%E8%BF%98%E8%A7%82%E5%AF%9F%E5%88%B0%E7%88%B8%E7%88%B8%E5%9C%A8%E9%92%93%E9%B1%BC%E5%89%8D%E8%A6%81%E2%80%9C%E8%AF%95%E6%BC%82%E2%80%9D%E6%9D%A5%E7%A1%AE%E5%AE%9A%E9%93%85%E5%9D%A0%28%E9%93%85%E5%9D%A0%E7%94%B1%E5%90%88%E9%87%91%E5%88%B6%E6%88%90%29%E7%9A%84%E5%A4%A7%E5%B0%8F%2C%E5%B0%BD%E9%87%8F%E4%BD%BF%E2%80%9C%E6%B5%AE%E6%A0%87%E2%80%9D%E6%9B%B4%E7%81%B5%E6%95%8F%28%E5%A6%82%E5%9B%BE17%E7%94%B2)
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