控制下颌运动的主要因素有4个,除了()
A.双侧颞下颌关节
B.牙齿的咬合接触关系
C.血液供应
D.神经结构
E.肌肉结构
参考答案:C
It _______ law for some people to let the children who are not old enough ____ in the factories for them.
A.goes against; to work
B.goes against; work
C.sets against; to be working
D.sets against; working
座地摇(平)臂抱杆应坐落在坚实稳固平整的地基或设计规定的基础上,若为软弱地基时应采取防止()的措施。
A.抱杆滑动
B.抱杆下沉
C.整体沉降
D.抱杆倾倒