搜索 - 科创

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，其曝光曲线应该更新，重新制作，这是因为（a）　　a.X射线管会老化 b.X射线管的真空度降低 c.外部电源变化 d.无需更新　　175.每一台X射线探伤机都必须制作专用的曝光曲线，这是因为对于不同的仪器

门罗公园所能给予那发明家的除了悲伤的回忆外别的什么也没有了，他于是把那些机件、药品、仪器等统统搬了出来而把它舍弃了。　　

伽赞尼伽还设计了专门用于测试裂脑人左、右脑之间联系的仪器。结果发现：当把一束光刺激只投射到病人的左视野（即只让右脑看见，而左脑看不见）时，尽管病人用左手按键对刺激作出了反应，可是他却说什么也没看见。

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