“Exam” is the shortened form of “examination” by back clipping. Then “quake” is used to mean “earthquake” by _____

“Exam” is the shortened form of “examination” by back clipping. Then “quake” is used to mean “earthquake” by ______ clipping.

“Exam” is the shortened form of “examination” by back clipping. Then “quake” is used to mean “earthquake” by ______ clipping.
【正确答案】：front

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