A-A+
A．They have no feathers.B．They are used for sw
问题详情
A．They have no feathers.
B．They are used for swimming.
C．They differ on males and females.
D．They are present only on certain species.
参考答案
正确答案：B
解析：M认为企鹅的翅膀更像是鳍状肢(flippers)，它们的作用是在水中划行。即使不熟悉flippers和paddle，抓住“They swim, too.”这句话，也可以锁定正确答案B。
