21. The ______ shoal found in the position of 32°12’ North and 114°36’ East cannot be identified from the ECDIS. Vessels in vicinity of the area please navigate with caution.
(A) conspicuous
(B) uncharted
(C) reported
(D) unconfirmed

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統計: A(31), B(546), C(101), D(73), E(0) #2334856

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