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The following are all variations of idioms, EXCEPT （ ）
A、replacement
B、addition
C、shortening
D、repetition
【正确答案】：D
【题目解析】：习语的变体包括：替换 (Replacement)、增词或减词 (Addition or deletion)、移位 (Position-shifting)、缩略法 (Shortening)和肢解 (Dismembering)