A-A+
Some birds that are molting maintain balance d
问题详情
Some birds that are molting maintain balance during flight by______.
A．constantly preening and caring for their remaining feathers
B．dropping flight feathers on both sides at the same time
C．adjusting the angle of their flight to compensate for lost feathers
D．only losing one-third of their feathers
参考答案
正确答案：D
解析：根据原文第四段第二句“Some species，for example．．．before shedding the next outermost， and so on．”，可以看出，正确答案是D项。
