滑动轴承能正常工作时摩擦表面之间最低限度应维持液体润滑状态。
参考答案：错
I felt it hard to keep up with my classmates. But when I want to _____, my teacher always encourages me to work harder.
A．go on
B．give up
C．run away
D．give back
颞叶底部血肿，出血动脉是（）
A.颈内动脉
B.大脑前动脉
C.大脑中动脉
D.大脑前、中动脉
E.大脑后动脉
