The span of the wing refers to the _______ .
A.total area of the wings
B.area of either wing
C.length between the two wing tips
D.length from the wingtip to wing root of either wing
正确答案是C
The span of the wing refers to the _______ .
A.total area of the wings
B.area of either wing
C.length between the two wing tips
D.length from the wingtip to wing root of either wing
正确答案是C