what chemicals did you use to treat the boiler water ?when you test alkalinity and acidity of water in boiler by pH test paper ? the result shows the boiler water is in acidiity . please describe what the possible cause is .

题目

what chemicals did you use to treat the boiler water ?when you test alkalinity and acidity of water in boiler by pH test paper ? the result shows the boiler water is in acidiity . please describe what the possible cause is .

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1.You’ll be punished by law if you ________ your child.(A) use(B) abuse(C) used(D) abused

2.—Where____you____lunch?—Athome．TherewasnoschoollunchA．did；haveB．are；havingC．will；haveD．do；have

3.()you()Jane last month? B: No, I().A、*/saw/didn’tB、Did/see/didn’tC、Did/saw/didn’tD、id/see/did

4.You look(). What () you () ?A、tire, did…doB、tiring, have…doneC、tired, do…doD、tired, have…been doing

更多“what chemicals did you use to treat the boiler water ?when you test alkalin ”相关问题

  • 第1题：

    You like playing football, ________ you?

    A. don’t

    B. does

    C. did


    参考答案：A

  • 第2题：

    What () you () at eight o'clock tomorrow morning?

    A、are; doing

    B、do; you

    C、will; do

    D、will; be doing


    参考答案：D

  • 第3题：

    Why do you want a new job ______you've got such a good one already?

    A. that

    B. where

    C. which

    D. when


    正确答案：D

    17．答案为D。为什么你已经有个好工作，还要找新工作?分析整句结构，从句做状语，只有 D为正确选项。

  • 第4题：

    You'd better ______ now.

    A、does

    B、doing

    C、do

    D、did


    参考答案： C

  • 第5题：

    What's ( )job? Are ( ) British?

    A. your, your

    B. you, your

    C. your, you


    正确答案：C

  • 第6题：

    You look（） What（）you（）?

    Atire；did；do

    Btiring；have；done

    Ctired；do；do

    Dtired；have；been doing


    D
    略

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