The ocean bottom—a region nearly 2.5 times greater than the total land area of t

游客2023-12-25 1

问题 The ocean bottom—a region nearly 2.5 times greater than the total land area of the Earth—is a vast frontier that even today is largely unexplored and uncharted, until about a century ago, the deepocean floor was completely inaccessible, hidden beneath waters averaging over 3, 600 meters deep.

选项 A、unrecognizable
B、unreachable
C、unusable
D、unsafe

答案 B

解析海底浩瀚无垠，面积几乎是地球陆地总面积的2. 5倍，即使在今天，还有大部分地区尚未开发。大约一个世纪以前，深海海底是完全无法接近的，因为它隐藏在平均超过3,600米深的水下。A项unrecognizable “a. 未被承认的；无法认出的”。B项unreachable “a. 无法达到的；不能获得的”。C项unusable “a. 不能用的”。D项unsafe “a. 不安全的”。注：题干inaccessible意为“难达到的，难接近的”，与unreachable“无法达到的”同义，故选B项。

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