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串联连接系统的可靠度()组成该系统各部件的可靠度。

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  • [单选题]串联连接系统的可靠度()组成该系统各部件的可靠度。

  • A. 等于
    B. 大于
    C. 小于
    D. 大于、等于

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  • [单选题]It is important that the water () very often as this can lead to increased deposits.
  • A. not be changed
    B. be changed
    C. should not be changed
    D. should be changed

  • [单选题]The cylinder covers and the liners are bolted together by means of studs () the cylinder frames.
  • A. screwing into
    B. being screw on
    C. to screw on
    D. screwed into

  • [单选题]If the feed pump for an auxiliary boiler fails to deliver the feed water to the boiler, the cause maybe ().
  • A. high steam pressure in the boiler
    B. abnormally high feed water temperature
    C. abnormally high boiler water temperature
    D. steam demand exceeding feed pump capacity

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