题型:填空题 — Mum, must I finish my homework first? — No, you _______. [ ]A. can'tB. mustn't C. couldn't D. don't have to. 查看答案
题型:填空题 车站值班员发现或接到行车设备故障的报告后,应立即通知设备管理单位相关人员,并在《()》内登记。设备管理单位应签认,尽快组织修复。对暂时不能修复的,应登记()和影响范围,并注明行车限制条件。 查看答案