尾轴密封装置防蚀衬套与密封环接触处的磨损凹痕可以采用（）予以修复。
A．焊补
B．修磨
C．光车
D．磨削
参考答案：C
Tonny is afraid _____, because he was bit by a dog. [ ]
A. fly
B. to flying
C. flying
D. of flying
肾精亏虚可出现（）
A.小儿囟门迟闭
B.女子月经量少
C.脑转耳鸣
D.老年人骨质脆弱
E.发脱齿摇
