The passage uses 'a bow and arrow' as an example to show______. A.how an arrow gets so much energy to fly B.why the trap-jaw ants have springy system C.why the trap-jaw ants' jaws move so fast D.how a bow and arrow works
A.A.how B.why C.why D.how
【参考答案】
C 根据文章第三段最后一句可推知，本段用弓箭作为比喻是用来说明为什么蚂蚁下颚有弹性的组织使蚂蚁的颚能够移动得如此......