对舒适解释下列哪一项不确切（） A.一种平静安宁的精神状态 B.一种自我满足的感觉

现要制取一些二氧化氮气体来做演示分子运动的实验。已知二氧化氮气体可以通过铜和浓硝酸反应Cu+4HNO₃(浓)===Cu(NO₃)₂+2NO₂↑+2H₂O得到。二氧化氮是一种红棕色的气体，密度比空气大，能和水反应生成HNO₃和NO气体，NO和NO₂都是大气污染物。现给出下列装置（A~F）：

（1）写出二氧化氮和水反应的化学方程式______________________________________；

（2）制二氧化氮的发生装置可以选__________，收集二氧化氮的装置应该选_________；

（3）要得到干燥的二氧化氮可将其通过________________； E装置中NaOH溶液的作用是                    。

（4）NO一遇到O₂就会变成NO₂，收集NO应用__________法；

（5）用如上图F装置演示分子运动时，为了缩短演示的时间，NO₂最好放在__________（选填“上”或“下”）面的集气瓶中，另一瓶是空气，抽去两瓶之间的玻璃片，可以看到________________________________________________________________。

现取m克铝镁合金与一定浓度的稀硝酸恰好完全溶解（假定硝酸的还原产物只有NO），向反应后的混合溶液中滴加bmol/LNaOH溶液，当滴加到VmL时，得到沉淀质量恰好为最大值n克，则下列有关该实验的说法中不正确的是（　　）

A．恰好溶解后溶液中的NO₃^-离子的物质的量为

bv

1000

mol

B．反应过程中转移的电子数为

n-m

17

mol

C．生成NO气体的体积为

22.4(n-m)

51

L

D．与合金反应反应的硝酸的物质的量为（

n-m

51+ bv 1000 ）mol

完形填空。
When I was in junior high, the eighth-grade bully (欺凌弱小者) struck me in the stomach. Not only did it   1  , but the shame and embarrassment were almost impossible to bear. I wanted   2   to even the score (摆平)! I   3  to meet him by the bike racks the next day and let him have it. For some reason, I told my plan to Nana, my grandmother-big   4  . She gave me one of her hour-long   5 . It was a total    6  , but among other things, I vaguely    7   her telling me that I didn't need to worry about him. She said, "Good deeds beget (产生) good results,   8   evil deeds beget bad results." I told her, in a nice way, that I thought she was right. I told her that I did good things all the time, and all I got  9  was a strike in the stomach. She stuck to her opinions,  10  . It   11   me 30 years to understand the   12   of her words. Nana was living in a board-and-care home in Laguna Hills, California. Each Tuesday, I   13   and took her out to dinner. We drove to a nearby simple little restaurant. I   14   pot roast for Nana and a hamburger for myself. The food arrived and as I dug in, I noticed that Nana wasn't eating. She was just staring at the food on her plate. 15   my plate aside, I took Nana's and cut her meat into small pieces. I then placed the plate back. 16  she very weakly, and with great difficulty, forked the meat into her mouth, I was struck with a(n)   17   that brought instant tears to my eyes. Forty years  18  , as a little boy sitting at the table, Nana had always done the same to me.      It had taken 40 years, but the good deed had been   19  . Nana was right. We harvest exactly  20  we sow. "Every good deed you do will someday come back to you."What about the eighth-grade bully? He ran into the ninth-grade bully.
( )1. A. harm           ( )2. A. eventually     ( )3. A. organized     ( )4. A. trouble     ( )5. A. lectures       ( )6. A push             ( )7. A. remind       ( )8. A. as           ( )19. A. in time   ( )10. A. therefore     ( )11. A. needed     ( )12. A. wisdom     ( )13. A. came off     ( )14. A prepared       ( )15. A. Taking     ( )16. A If             ( )17. A. mind        ( )18. A once           ( )19. A returned       ( )20. A. which	B. injure     B. immediately B. planned     B. prize       B. stories     B encouragement B. remember     B. but       B. in turn     B. however     B. spent     B. intelligence B. came back   B booked       B. Removing     B As           B. idea     B ever         B reacted       B. what	C. hurt      C. directly     C. designed     C. time         C. instructions C success       C. recognize     C. so       C. in order     C. though   C. cost     C. knowledge     C. came by     C purchased     C. Moving     C Since         C. thinking     C since         C regained       C. when	D. wound         D. desperately D. wished         D. mistake       D. scolding     D. drag           D. recall         D. and           D. in return   D. nevertheless   D. took           D. belief         D. came across   D. ordered       D. Making         D. After         D. memory         D. previously     D. replaced       D. how

第二语言获得：是指在第二语言的语言环境中，通过旨在沟通意义的言语交际活动，不知不觉地获得一种语言。 根据这个定义，下列对第二语言的掌握过程属于“第二语言获得”的是( )

A．约翰是美国一家公司驻中国的代理，刚来中国时对汉语一窍不通，便参加了业余汉语学习班，现在。他已经能用汉语自如地进行交际了。

B．李红大学毕业时凭着较高的TOEFL成绩去美国继续深造，到美国两个月后，便能在学习和生活中用流利的英语交流了。

C．于晶想去日本留学，便在中国找了一个日本人教她学日语。半年后，已经掌握了基本的日语交际用语。

D．美国人安娜性格开朗、活泼健谈，随父母来到中国后，在短短的一年内，没参加任何汉语学习班便学会了怎样用汉语交际。

(请根据背景材料，按要求作答)
某混凝土重力坝建设工程项目，在初步设计文件完成后，建设单位准备采用公开招标方式择优选择施工单位，招标公告中要求投标人应是具有二级资质等级的施工企业。

[背景] 开标前，公证处倾向提出要对各投标人的资格进行审查。审查结束后，对于B投标人是由两家工程公司联合组成的联合体，其中一家公司为二级施工企业，另一家公司为三级施工企业，均被认定为不符合投标资格。 [问题] 2．开标会上能否列入“审查投标人的资格”这一程序为什么 3．B投标人被认定不符合投标资格是否正确说明理由。