But the fragileecosystem could be hurt by a plan to dredge more than 23 miles of

游客2025-01-28 18

问题 But the fragileecosystem could be hurt by a plan to dredge more than 23 miles of river at the delta’s southern end.

选项 A、flimsy
B、optical
C、marginal
D、vacant

答案 A

解析句意：在三角洲最南部计划挖掘23多英里长的河流，可能会破坏脆弱的生态系统。fragile(脆弱的)；flimsy(与fragile同义)；optical(视力的)；marginal(边缘的)；vacant(空的，空缺的)。

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