She was confronted with a(n) ___ (tolerate) situation the other day.
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下列情况选用的联轴器类型是什么?① 刚性大,对中性好的轴间传动;( )② 两轴倾斜一角度的轴间传动;( )③ 工作有轻微振动及启动频繁的轴间传动;( )④ 转速高,载荷重,需要经常正反转的轴间传动( )
唯物辩证法与形而上学的根本分歧和斗争焦点在于是否承
A. 事物是客观存在的
B. 事物是永恒运动的
C. 事物是普遍联系的
D. 事物的内部矛盾是其发展的根本 动 力
It's ages _______her.
A. since I saw
B. that I didn't see
C. since I didn't see
D. ago I saw
________you study harder,you 'll never pass the exam
A. If
B. Until
C. Unless
D. because