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If I ......... very hard, I would have been able to stop smoking

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  • 1000道EFL基础语法练习题
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If you really want to be helpful, then you ......... to tell me

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......... you able to lend me some money if I promise you that y

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If I ......... you, I should work very hard so that I could earn

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I will try very hard to come and have dinner at your house if I

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Will you come to dinner with us if we ......... a babysitter for

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I would want very much to move to a new house if I ......... tha

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If you ......... got that job, would you have been able to move

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......... I bought you a new car, would you be very happy?

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If I win the lottery, I ......... buy you a very big car as a pr

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最新文章

  • [题号59] 发生汽蚀或抽空会使机封立刻失效
  • [题号58] 机封运转时,如果沿着轴套和轴之间向外泄漏,则属于压盖垫有问题。
  • [题号52] 机械密封的密封性能要好于一般的填料密封。
  • [题号51] 静环密封圈阻止了静环与机封压盖间的泄漏。
  • [题号50] 机械密封是离心泵上采用的唯一轴封装置。
  • [题号45] 一般情况下,轴向力的方向总是指向泵吸入口。
  • [题号44] 对于单级离心泵,采用双吸叶轮后,就不需要安装推力轴承。
  • [题号43] 当离心泵轴向力不是特别大时,不需要平衡轴向力。
  • [题号36] 介质的温度升高可能使离心泵产生汽蚀。
  • [题号35] 对离心泵来说,发生汽蚀或抽空只要及时处理,不会损坏泵的零件使机械密封立刻失效。
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