Read the passage carefully, then complete the sentence below by identifying the unstated central claim (implicit main idea) supported by the text.
Cevap:Constructing heavy facilities across Arctic tundra introduces structural warmth that gradually penetrates the soil. As the underlying permafrost thaws, moisture softens the subgrade, resulting in uneven foundation shifting and catastrophic structural cracking. To prevent this destabilization, builders sink sealed, fluid-filled steel pipes known as thermosyphons around load-bearing pillars. During subzero winters, liquid inside these tubes absorbs ground warmth, evaporates, travels upward to release heat into the ambient air, and condenses back down without requiring electrical power. By keeping the subsoil frozen year-round, the building footings maintain their integrity.
Based on the passage, the author's implicit main idea is that 【passive heat removal】 is essential to protect Arctic buildings from foundation failure.
Based on the passage, the author's implicit main idea is that 【passive heat removal】 is essential to protect Arctic buildings from foundation failure.
Cevap
passive heat removal (or permafrost preservation / passive ground cooling)
The correct response synthesizes the entire passage: the author explains how structural warmth causes foundation damage by thawing permafrost and how passive thermal cooling prevents this by maintaining solid subsoil.
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Anahtar Kavram
Synthesizing an unstated central claim from descriptive technical problem-solution details.
Tahmini Süre:1m 5s