These instruments measure changes that might signal a coming quake. 39 , in a recently designed instrument, light from a laser flashes across a fault in California.
AFor example正確答案
BUpon contact
CAbove all
DIn return
答案與詳解
For example(例如)用於舉例。前句提到「這些儀器測量可能預示地震的變化」,後句具體描述「加州一台以雷射閃光穿越斷層的儀器」,正是舉例說明,語意完全吻合。
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