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【单选题】
已知方程4x=8与x-k=1的解相同，则4k 2 -1的值为（ ）A.
1
B.
3
C.
8
D.
17
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【简答题】Dictation (you will listen four times)
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A.
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B.
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C.
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D.
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A.
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B.
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【简答题】dictation: listen carefully and finish the dictation.
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