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阅读名著《海底两万里》,回答下列问题。 (1)请概括出尼摩船长和阿龙纳斯在海底环球探险旅行时经历的三次险情。(2)你认为尼摩船长是一个什么样的人?
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光纤是传输光信号的______.光纤通信的优点有:______.
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Lily succeeded,for she had made a great________and got over plenty of difficulties. [ ]
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The best times to visit Shangri-la are spring and autumn ___ the temperature is at its mildest.
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