单项选择【说明理由】1.给钢笔吸墨水时,把笔上的弹簧片按几下后松开,墨水就吸到笔中橡皮管里去了,其原因是( )A.弹簧片有弹力 B.橡皮管有吸力从而把墨水吸进 C.手对弹簧片有压力 D.橡
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![单项选择【说明理由】1.给钢笔吸墨水时,把笔上的弹簧片按几下后松开,墨水就吸到笔中橡皮管里去了,其原因是( )A.弹簧片有弹力 B.橡皮管有吸力从而把墨水吸进 C.手对弹簧片有压力 D.橡](/uploads/image/z/4913014-22-4.jpg?t=%E5%8D%95%E9%A1%B9%E9%80%89%E6%8B%A9%E3%80%90%E8%AF%B4%E6%98%8E%E7%90%86%E7%94%B1%E3%80%911.%E7%BB%99%E9%92%A2%E7%AC%94%E5%90%B8%E5%A2%A8%E6%B0%B4%E6%97%B6%2C%E6%8A%8A%E7%AC%94%E4%B8%8A%E7%9A%84%E5%BC%B9%E7%B0%A7%E7%89%87%E6%8C%89%E5%87%A0%E4%B8%8B%E5%90%8E%E6%9D%BE%E5%BC%80%2C%E5%A2%A8%E6%B0%B4%E5%B0%B1%E5%90%B8%E5%88%B0%E7%AC%94%E4%B8%AD%E6%A9%A1%E7%9A%AE%E7%AE%A1%E9%87%8C%E5%8E%BB%E4%BA%86%2C%E5%85%B6%E5%8E%9F%E5%9B%A0%E6%98%AF%EF%BC%88+%EF%BC%89A.%E5%BC%B9%E7%B0%A7%E7%89%87%E6%9C%89%E5%BC%B9%E5%8A%9B+B.%E6%A9%A1%E7%9A%AE%E7%AE%A1%E6%9C%89%E5%90%B8%E5%8A%9B%E4%BB%8E%E8%80%8C%E6%8A%8A%E5%A2%A8%E6%B0%B4%E5%90%B8%E8%BF%9B+C.%E6%89%8B%E5%AF%B9%E5%BC%B9%E7%B0%A7%E7%89%87%E6%9C%89%E5%8E%8B%E5%8A%9B+D.%E6%A9%A1)
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