問題詳情

How Fast does a Tuna Fish Swim?One reason for the tuna's high speed is its tail which beats an incredible 10 to 20 times persecond, as efficient, fisheries biologists say, as a rotating propeller on a boat. Anotherreason is special muscles under the tuna's skin.
【題組】3. One of the reasons why the tuna swims so fast is because
(A) its tail beats very fast
(B) the shape of its tail is like a propeller on a boat
(C) it has incredible beats
(D) its tail beats 10 to 20 seconds each time.

參考答案

答案：A
難度：適中0.6
統計：A(21),B(6),C(3),D(4),E(0)

用户評論

【【站僕】摩檸Morning】評論

原本答案為B,修改為A

【Joyce Lin】評論

propeller螺旋槳；推進器[C]

【pierreisthin】評論

One reason for the tuna's high speed is its tail which beats an incredible 10 to 20 times per second.鮪魚高速運行的一個原因是它的尾巴每秒拍動10到20次。