道岔(调节器)区()应通过更换不同规格调高垫板进行调整,调高垫板的规格和数量应符合铺设图要求。调整作业应作记录。
A.轨距
B.水平
C.高低
D.支距
参考答案:B, C
—Could you tell me how to improve spoken English?
—Well, just take every chance to practise ______and don’t be shy. [ ]
A. speak
B. to speak
C. speaking
D. spoke
药物的有效期
A.10.9B.11/2C.pHmD.EE.K