当两齿轮接触斑点的位置正确，面积太小时，可在齿面上加研磨剂使两齿轮进行研磨以达到足够的接触面积。
参考答案：对
The boy has been going back home later _____, which worries his parents.[ ]
A. as usual
B. than usual
C. as usually
D. than usually
银监局对商业银行做的风险评级结论不属于行政许可事项276、
