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《蜀道难》的主旨句是:__________,__________.
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逝者如斯,而未尝往也;___________,而卒莫消长也。(苏轼《赤壁赋》)
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My aunt told me she___________ to see my mother on Sunday.
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For many years, no one could communicate with people who had been born without hearing.
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4X-3Y-6Z=0 X+2Y-7Z=O(XYZ不等于0), 求代数式5X方+2Y方-Z方÷2X方-3Y方-10Z方的值
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