21 How do scientists explain the formation of rogue waves in the North Sea?
(A) Because of the colliding waves.
(B) Because of the movement of small waves.
(C) Because of the fast-moving currents.
(D) Because of some unidentified reasons.

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統計： A(43), B(63), C(52), D(175), E(0) #1427633

Yu Ning Liu

B1 · 2017/04/19

#2141781

(A) Because of the c...

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B2 · 2017/05/09

#2179430

However, it does not explain why the waves form in places where there are no fast-moving ocean currents—such as in the North Sea.

21 How do scientists explain the formation of rogue waves in the North Sea? (A) Because of the colliding waves. (B) Because of the movement of small waves.(C) Because of the fast-moving currents. (D) Because of some unidentified reasons.