内疝是指肠管嵌入何处的一种病症（）。 A.嵌在接近十二指肠空肠连接部 B.嵌入小网膜

某实验小组将洁净的铁钉投入到氯化铜溶液中，发现铁钉表面生成红色固体物质的同时有较多气泡产生，生成的气体是什么呢？

【提出猜想】从物质组成的元素角度分析，产生的气体可能是HCl、Cl₂、O₂、H₂．

【查阅资料】25℃时：HCl气体在水中的溶解度是500，极易溶于水；Cl₂在水中的溶解度约是2，易溶于水，它能与NaOH溶液发生化学反应．

【讨论分析】依据猜想和资料，实验小组的同学进行了如下讨论：

（1）甲同学根据资料推理得出产生的气体不可能是______．

（2）乙同学认为是O₂，则检验O₂的方法是______．

（3）丙同学认为是Cl₂，则只需将产生的气体通入盛有NaOH溶液的洗气瓶中，称量通气前后洗气瓶的质量进行检验．Cl₂与NaOH溶液反应的化学方程式是：Cl₂+2NaOH=NACl+NaClO+X，则X的化学式是______．

【设计方案】实验小组的同学合作设计了如下的试验方案，排除和验证猜想的气体．

①如果产生的气体是O₂和H2，你认为装置C中存在的安全隐患是______．

②丁同学认为：为确保安全，实验前应先收集一试管气体，用拇指______，若没有听到______，方可采用上面的装置进行实验．

【验证实验】经丁同学确认安全后，小组同学首先对装置A进行称量，再将收集到的干燥的气体从a处通入，过一会儿点燃C处的酒精灯，过一段时间后，发现表面含CuO的铜网变为光亮的红色；停止通气，再称量装置A，发现质量无增减．

【实验结论】铁钉与氯化铜溶液反应时，产生的气体是______．

【实验反思】（1）装置B中浓H₂SO₄起______作用．

（2）由上述实验可以推出氯化铜溶液显______（填“酸性”、“碱性”或“中性”）

完形填空（共20小题，每小题1.5分，满分30分）

阅读下面短文，掌握其大意，然后从16－35各题所给的A.B.C.D四个选项中，选出最佳选项。

How did you do it, Dad? How have you managed not to take a drink for almost 20 years? It took me almost 20 years to have the 16 to even ask my father this very personal question. When Dad first 17 drinking, the whole family was on pins and needles every time he got into a 18 that, in the past, would have started him 19 again. For a few years we were 20 to bring it up for fear that the drinking would begin again.

"I had this little poem that I would recite to myself at least four to five times a day," was Dad's 21 to my 18-year-old unasked question. "The words were a constant (经常的) 22 to me that things were 23 so hard that I could not deal with them," Dad said. Then he 24 the poem with me. The poem's 25, yet profound (深刻的) words immediately became 26 of my daily routine as well.

About a month after this 27 with my father, I received a gift in the mail from a friend of mine. It was a book of daily sayings of wisdom with one 28 for each day of the year.

It has been my 29 that when you get something with days of the year on it, you naturally turn to the page that lists your own 30.

I 31 opened the book to November 10 to see 32 words of wisdom this book had in store for me. I was 33 when I looked at the page, and then tears of disbelief and appreciation 34 down my face. There, on my birthday, was the exact same poem that had 35 my father for all these years! It is called the Serenity (平静) Prayer:

God, grant me the serenity to accept the things I cannot change; the courage to change the things I can; and the wisdom to know the difference.

16. A. chance      B. courage    ability        D. right

17. A. gave up     B. took up      C. went on      D. carried on

18. A. way        B. habit        C. situation      D. house

19. A. reciting     B. asking       C. smoking      D. drinking

20. A. sure        B. uncertain     C. afraid        D. eager

21. A. reply       B. words        C. excuse       D. explanation

22. A. fear        B. imagination   C. thought       D. reminder

23. A. never       B. seldom       C. always       D. ever

24. A. discussed    B. shared       C. offered       D. talked

25. A. wonderful   B. long         C. simple        D. boring

26． A. all       B. that          C. any          D. part

27. A. talk        B. quarrel        C. trip          D. lesson

28. A. listed       B. included      C. read         D. said

29. A. method     B. experience     C. wealth       D. message

30. A. character    B. birthday       C. qualities     D. favorites

31. A. doubtfully   B. carefully      happily      D. hurriedly

32. A. where      B. whether       C. what        D. how

33. A. excited      B. astonished     C. disappointed  D. frightened

34. A. hung        B. pulled        C. rolled        D. pushed

35. A. troubled     B. disturbed      C. pleased       D. helped

对于穿越高速公路的燃气管道，其管道套管端部距离道路边缘不应小于( )m。

A．1.5
B．1.0
C．1.2
D．1.8

NAC中包含的关键组件功能不同，其中作为企业网络中安全策略的实施点，强制用户准入认证、隔离不合格终端、为合法用户提供网络服务的组件是（）。

A.通信代理

B.网络访问控制设备

C.接入终端

D.策略服务器

《中华人民共和国节约能源法》规定，限制生产、进口、销售国家明令淘汰或者不符合强制性能源效率标准的用能产品、设备；限制使用国家明令淘汰的用能设备、生产工艺。（）