The invention of the light bulb was a major ___ in human history because this invention allows for longer productive hours and improved quality of life at night.
Ahardship
Bdispute
Cmilestone正確答案
Dbargain
答案與詳解
為什麼答案是 C
milestone 字面意為「里程碑」，引申為歷史上的重大進展或關鍵事件，完美呼應「major in human history」與後面延長工時、提升生活品質的正面描述。
考點：艱困考點：爭議考點：里程碑考點：交易
載入中…
