基础制动装置的摩擦及转动部分涂润滑脂的目的，是为了减小（），使基础制动装置作用灵活， 发布时间：2017-04-25 05:00 │ 来源：www.tikuol.com 题型：填空题 问题： 基础制动装置的摩擦及转动部分涂润滑脂的目的，是为了减小（），使基础制动装置作用灵活，提高制动效率，同时可防止锈蚀，延长零部件的使用寿命。
题型：填空题 阅读理解。Subject: Date: From: To:Complaints (投诉) May 30, 2004 david@ hotmail. com glasgow@ silverline. netDear Sir or Madam, Last Thursday, I travelled on the 8:40 a. m. train from Glasgow to London King's Cross and I was very unhappy with the service provided by your company The train was forty minutes late leaving Glasgow, and although the guard apologized, we were not given any reasonfor the delay (误点). We then had further delays when the train crew (乘务组人员) changed at Preston and had to waitanother thirty minutes. As a result, I missed my flight fromLondon Healthrow to Frankfurt and had to wait for several hours. What's more, the service on the train was also very poor.The trip took over five hours; unluckily, there was no restaurant car on the train but only a bar with soft drinks. Worst of all,the air conditioner broke down halfway through the trip and it got hotter and hotter in the train.However, there was no apology for this, and before we reached King's Cross, the temperature was over 40 ℃. In view of the poor service, I feel I am entitled to compensation (有权索赔) . I look forward to hearing from you. Yours faithfully, David Robertson 1. Where did David Robertson get on the train last Thursday? In ______________________________________________________2. What time did the train start its trip to King's Cross that morning? At ______________________________________________________3. What happened to David because of the delay of the train? He missed the flight and had to _______________________________ 4. What did the bar on the train serve? _________________________________________________________5. Why did it get hotter and hotter in the train? Because __________________________________________________6. What do you think the company will do after they receive David's email? I think they will ____________________________________________ 查看答案
题型：填空题 2012年7月l1日开始，江苏省所有“一户一表”的家庭全面执行阶梯电价。阶梯电价是指把户均用电量设置为若干个阶梯分段或分档次定价计算费用，随着消费电量的增长，每千瓦时电价逐级递增。实行阶梯电价 ①有助于引导人们绿色消费 ②有助于提高能源利用效率③表明生活必需品应坚持政府定价 ④不利于提高居民生活水平A．①③B．①②C．①④D．③④ 查看答案
题型：填空题 下列有关细胞转化试验的描述错误的是（）A.其不以致突变为观察终点，可以弥补以致突变试验来筛查化学致癌物的不足B.试验的观察终点是恶性变的细胞C.可检出非遗传毒性致癌物D.可检出遗传毒性非致癌物E.可应用于细胞转化试验的细胞有：原代细胞、细胞系和病毒感染细胞 查看答案