道岔滑床板损害、变形或滑床台磨耗大于3毫米时,应及时修理或更换。
参考答案:对
—I wouldn't like to go out with you. I'm so tired.
—________ You promised to go out for a drive.[ ]
A. Really.
B. Not at all.
C. Come on!
D. No matter.
银屑病临床表现中,“薄膜现象”是指()
A.急性期皮损常发生于外伤处
B.再刮去薄膜后,可见小出血点
C.指趾甲板损害为点状凹陷,失去光泽
D.玫瑰色皮疹上覆薄层糠状鳞屑
E.刮去表皮银白色鳞屑,可见一层淡红发亮的薄膜