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下列关于溶液的说法,不正确的是( )

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  • 【名词&注释】

    电压表(voltmeter)、电流表(ammeter)、硝酸钾(potassium nitrate)、氯化钠(sodium chloride)、水溶液(aqueous solution)、滑动变阻器(slide rheostat)、理化生实验、溶解度变化(dissolving variation)、堂兄弟(cousin)

  • [单选题]下列关于溶液的说法,不正确的是( )

  • A. 冷却或加入硝酸钾固体都能使接近饱和的硝酸钾溶液达到饱和
    B. 汗水浸湿的衣服晾干后出现白色斑迹,是因为水分蒸发后盐分结晶析出
    C. 氨水是氨气的水溶液,根据气体溶解度变化(dissolving variation)规律,贮存时要阴凉密封
    D. 氯化钠在20℃时溶解度是36g,则100g的氯化钠溶液中含有氯化钠36g

  • 查看答案&解析 点击获取本科目所有试题
  • 举一反三:
  • [单选题]Henry is a little fatter than he wants to be. He ( 1 ) to lose some weight. So he is on diet. He tries not to eat to0 ( 2 ) and he eats very little sugar because it will make him ( 3 ) . He also does exercise every ( 4 ) .' He swims very often,( 5 ) he runs about two kilometers a day.Now he is ( 6 ) than before. Henry's sister,Susan,is healthier than Henry. ( 7 ) is also younger and thinner than he is. She does ( 8 ) every day,too. She doesn’t ( 9 ) much meat. But she eats a lot of fruit and vegetables because she thinks ( 10 ) are better for her health.( )1.
  • A. wants
    B. thinks
    C. asks
    D. likes

  • [单选题]在今年理化生实验技能测试中,实验室准备的器材有:电源、电压表、电流表、滑动变阻器、开关、待测电阻及导线若干。在做测电阻的实验时,小明在连接电路过程中,由于疏忽,把电压表和电流表的位置给颠倒了,其它连接正确无误.这个电路闭合开关后所产生的现象是
  • A. 电流表有读数,电压表的读数几乎为零 B.电压表将被烧坏
    B. 电压表有读数,电流表的读数几乎为零 D.电流表将被烧坏

  • [单选题]39. What does Lucy want to buy?
  • A. Some picture books
    B. Some color pencils
    C. Something to eat
    D. A, B and C

  • [单选题](A)TheWaterWorldSwimmingPoolisopeneverydayfromeighto’clockinthemorninguntilhalfpastsevenintheevening.Itcoststwodollarssixtytoenterthepool.Thereisaspecial
  • A. cheappriceforstudentswithastudentcard.Thepriceisonedollarforty.Butyoumustbringyourstudentcardwith
    B. you.
    C. OnWednesdaymorningthepoolisonlyopentomothersandbabies.Somotherscanenjoythemselvesinthewater
    D. withtheirbabies.PleaseleaveyourolderchildrenathomeonWednesdaymorning.
    E. ThenewWaterWorldCaféwillbeopenuponJune22nd.Fromthecaféyoucanwatchtheswimmersorenjoyadrink
    F. afteryouswim.
    G. Pleasecall2105369formoreinformation.WelookforwardtoseeingyouattheWaterWorldSwimmingPool.
    H. 46.HowlongistheWaterWorldSwimmingPoolopeneveryday?
    I. Elevenhours.
    J. Sevenhours.
    K. Elevenandahalfhours.
    L. Sevenandahalfhours.

  • [单选题]15.
  • A. brother
    B. uncle
    C. cousin
    D. son

  • [单选题]Themassageismainlyabout_________.
  • A. stepsofstudyingscience
    B. difficultiesinreadingscience
    C. waysofreadingsciencepassages
    D. researchesonscienceandEnglish

  • [单选题]25. Where is the nurse-s house?
  • A. Behind Mike's.
    B. Beside Jack's.
    C. Beside Mike's.
    D. Under Jack's.

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