题目内容
在矿物摩氏硬度计中，摩氏硬度为7的矿物是（）
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A case can protect your iPod from being bent, dropped or crushed.
You should fit a connector(接头) into a port(端口) correctly and join them with ease.
iPod playtime might shorten if it’s stored in a place where the temperature is below 0oC.
You can use a soft and slightly damp cloth with household cleaners to clean your iPod.
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