题干

浓硝酸、稀硝酸都具有强氧化性,某学习小组探究浓、稀硝酸氧化性的相对强弱,按下图装置进行试验(夹持仪器的装置已略去).实验表明浓硝酸能将NO氧化成NO2,而稀硝酸不能氧化NO.由此得出的结论是浓硝酸的氧化性强于稀硝酸.

可选药品:浓硝酸、3mo/L稀硝酸、蒸馏水、浓硫酸、氢氧化钠溶液及二氧化碳

已知:氢氧化钠溶液不与NO反应,能与NO2反应

2NO2+2NaOH═NaNO3+NaNO2+H2O

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     Deputy (副职) Head Teacher Wanted

     Position:Deputy head teacher

     Employer:Bracknell Forest Council

     Published:10∶00 A.M.Mon.Dec.12,2011

     Closing date:10∶00 A.M.Mon.Jan.16,2012

     Working pattern:Full­time

     Salary:£20,000-£34,999 per year

     Location:Jennett’s Park Primary School,Bracknell,Berkshire

    The governors are seeking to employ an enthusiastic deputy head teacher to be a key partner in founding and leading our brand­new primary school in Bracknell.

     We offer:

    ●a brand­new school building

    ● the opportunity to work in close partnership with the head teacher and governors to create and develop a new staff team

    ●a growing community looking forward to their new school opening

    ●the opportunity for further professional development which will support you through the next stage of your career

    ●the opportunity to lead key projects across the school

    You will be:

    ●an excellent classroom practitioner (从业人员),who will enjoy shaping and delivering a broad,balanced and creative curriculum in class

    ●able to lead the staff by focusing on teamwork

    ●committed to working in partnership with parents and the nearby community

    For further information,you can contact the head teacher,Ms Maria Soulsby,by dialing 32899918 or you can send an email to mariasoulsby @bracknell­forest.gov.uk. You can also come to visit our school in person.

     If you have not heard from us two weeks after the closing date,that means your application has not been accepted.Apply using Bracknell Forest Council application forms only;CVs (简历) will not be accepted.

    This school is committed to safeguarding and promoting the welfare of children and expects all staff to share this commitment.

    All staff employed in the school must be aware that a check on the criminal record will be done.