易发生骨折的面骨为()
A.颧骨
B.上颌骨
C.颧弓
D.下颌骨
E.下齿槽骨
参考答案:D
For quite a few students, their teacher’s advice is more important than _________ of their parents.
A. one
B.that
C.it
D.any
关于力和运动,下列各说法中正确的是[ ]
A.踢出去的足球在地面上越滚越慢,说明物体的运动需要力来维持
B.在平直的公路上匀速行驶的汽车,受平衡力作用
C.物体受平衡力的作用,一定保持静止状态
D.运动的物体有惯性,静止的物体无惯性