短文改错（共10小题；每小题1分，满分10分）

Dear Tom,

I know there have trouble for you to communicate with others, and you may often feel lonely．That's why you are new from here and people don't know about you．But I think you can make it if you can follow the advices below．

First, you should take a active part in the discussions and show your own opinions about the matters．At the same time, never fail to listening to other people's views．Second, you should learn your classmates' likes and dislikes．Only in this way can you be able to get to know more different people and show them that you are actually very friendly．Last but not least, I will always be ready to help you．We can take part in some activities together, that I can introduce you to others．

As time going on, people will know you better and be willing to make friends with you．

Best regards．

Peter

某学习小组探究浓、稀硝酸氧化性的相对强弱，按下图装置进行实验(夹持仪器已略去)．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、3mol／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 （1）装置①中发生反应的离子方程式是                                       ．

（2）装置②的目的是                                ，发生反应的化学方程式是                                                                       ．

（3）实验应避免有害气体排放到空气中，装置③、④、⑤、⑥中盛放的药品依次是

                                                                     ．

（4）实验的具体操作是：先检验装置的气密性，再加入药品，然后打开弹簧夹，通入

           目的是                                                    ．

（5）该小组得出的结论所依据的实验现象是                                   ．