动词填空。

Nancy,

         1   (Thank) for    2     (take) care of my dog . Could you please   63 (do)   these things every day?   4  _(Take)him for a walk.   5    (Give)him water and    6    (feed)him. Then wash his bowl.   7    (Play)with him.Don’t    8    (forget) to clean his bed.   9     (Have)fun!   10    (See)you next  week.

                                                                                                                                      Thanks,

                                                                                                                                        Thomas

1._______   2.________  3.________   4.________   5.________

6._______   7.________  8.________   9.________   10.________

已知氮的氧化物跟NaOH溶液发生的化学反应如下：

3NO₂＋2NaOH＝2NaNO₃＋NO↑＋H₂O

NO₂＋NO＋2NaOH＝2NaNO₂＋H₂O

现有2mol NO₂和1mol NO组成的混合气体，要用NaOH溶液使其完全吸收，最终无气体剩余。现有浓度为1mol/L的NaOH溶液，则需此NaOH溶液的体积是[ ]

A．2L          

B．3L            

C．7/3L          

D．10/3L