대광고 영어 · 글의 순서 양방향 근거 4문항 · 모의고사형

A coastal town once protected its harbor with a wall that reflected waves back toward the sea. During storms, the reflected water met incoming waves, producing turbulence near the wall. Engineers then added a broad bed of rough stones in front of it. Water entered the gaps between the stones, and friction reduced some of its energy before it reached the wall. This addition did not make the harbor invulnerable. Its effectiveness depended on water depth, stone size, and the direction of a storm. Nevertheless, it changed the design principle: protection no longer relied entirely on opposing the force at a single hard boundary. Part of the force was dispersed across a wider area. The town's experience illustrates why a structure that appears less solid can sometimes protect a solid structure by allowing controlled movement within it.

A coastal town once protected its harbor with a wall that reflected waves back toward the sea. During storms, the reflected water met incoming waves, producing turbulence near the wall. Engineers then added a broad bed of rough stones in front of it. Water entered the gaps between the stones, and friction reduced some of its energy before it reached the wall. This addition did not make the harbor invulnerable. Its effectiveness depended on water depth, stone size, and the direction of a storm. Nevertheless, it changed the design principle: protection no longer relied entirely on opposing the force at a single hard boundary. Part of the force was dispersed across a wider area. The town's experience illustrates why a structure that appears less solid can sometimes protect a solid structure by allowing controlled movement within it.

(A) This addition did not make the harbor invulnerable. Its effectiveness depended on water depth, stone size, and the direction of a storm.

(B) Nevertheless, it changed the design principle: protection no longer relied entirely on opposing the force at a single hard boundary. Part of the force was dispersed across a wider area. The town's experience illustrates why a structure that appears less solid can sometimes protect a solid structure by allowing controlled movement within it.

(C) During storms, the reflected water met incoming waves, producing turbulence near the wall. Engineers then added a broad bed of rough stones in front of it. Water entered the gaps between the stones, and friction reduced some of its energy before it reached the wall.

A coastal town once protected its harbor with a wall that reflected waves back toward the sea. During storms, the reflected water met incoming waves, producing turbulence near the wall. Engineers then added a broad bed of rough stones in front of it. Water entered the gaps between the stones, and friction reduced some of its energy before it reached the wall. This addition did not make the harbor invulnerable. Its effectiveness depended on water depth, stone size, and the direction of a storm. Nevertheless, it changed the design principle: protection no longer relied entirely on opposing the force at a single hard boundary. Part of the force was dispersed across a wider area. The town's experience illustrates why a structure that appears less solid can sometimes protect a solid structure by allowing controlled movement within it.