how can you create good vacuum on the fresh water (FW) distiller ?

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how can you create good vacuum on the fresh water (FW) distiller ?

相似考题

1.On Monday morning some teachers exchanged a few ().A.how-are-yousB.of how-are-you’sC.how-are-you’sD.of how are you

2.“Must I finish my homework now?” “No, you() . But you() finish it this evening. ”A. mustn’ t…mustB. needn’ t…mustC. can’ t…canD. can’ t…must

3.22．In the daytime， when you dive in the sea， you ________A． can see everything green and blueB． can- t be in dangerC． can catch nothingD． can't see anything clearly

4.－－Must we finish our homework now? －－No, you ______. You _______ finish it after school.A.needn't , mayB.mustn't , mayC.can't , canD.needn't , must

更多“how can you create good vacuum on the fresh water (FW) distiller ? ”相关问题

  • 第1题：

    you， do， eraser， how， spell【连词成句）

    ________________________？


    正确答案：
    54. How do you spell eraser 

  • 第2题：

    Must we clearn the room before we leave?No, you _______

    A.mustn't

    B.can't

    C.needn't


    参考答案：C

  • 第3题：

    —_______ I return the book to the library this week?— No, you _______.You can keep it until the end of this month.

    A.Must; needn’t

    B.Can; can’t

    C.May; mustn’t

    D.Can; mustn’t


    答案：A

  • 第4题：

    This is very important. You_____remember to shut down your computer every

    evenlng。

    A. ought

    B. need

    C. must

    D. can


    参考答案C

  • 第5题：

    You don’t look________; you’d better see a doctor.

    A.mice

    B.well

    C.kind

    D.good


    参考答案：B

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