计算题：过热器管道下方38.5m处安装一只过热蒸汽压力表，其指示值为13.5MPa，

一个NO分子的质量为a克，一个NO₂分子质量为b克，N_A表示阿伏加德罗常数，则氧原子的摩尔质量为（　　）

A．（b-a）N_Ag

B．（b-a）g/mol

C．（b-a）N_A g/mol

D．（b-a）N_A

阅读下面短文，掌握其大意，然后从21—40各题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题纸上将该选项标号涂黑。

During the war,my husband was stationed at an army camp in a desert in California.I went to live there in order to be 21  him. I hated the place .I had never  22  been so unhappy . My husband was ordered out on a long-term duty,and I was left in a tiny shack(棚屋) alone. The heat was  23  -almost 125 0F even in the shade of a cactus(仙人掌)。 24  a soul to talk to . The wind blew non-stop ,and all the food I ate ,and the evry air I breathed,were  25   with sand , sand , sand !

I was so sorry for myself that I wrote to my parents. I told them I was  26   and coming back home.I said I couldn’t stand it one minute longer. I  27  be in prison! My father answered my  28  with just two lines-two lines that will always sing in my  29  - two lines that completely changed my life :

Two men looked out from prison bars

One saw the mud ,the other saw the stars

I read those two lines  30   I was ashamed of myself. I made up my mind I would find out what was good in my present  31  ; I would look for the stars

I made friends with the natives,and their  32  amazed me. They gave me presents of their favorite artworks which they had  33  to sell to toueists . I studied the delightful forms of the cactus .I watched for the desert sunsets,and  34  for seashells that had been left there millions of years ago when the desert had been an ocean  35 

What brought about this  36   change in me ? The desert hadn’t changed , 37   I had .I had changed my  38   And by doing so ,I changed an unhappy experience into the most amazing  39  of my life . I was excited by this new world that I had dicovered I had looked out of my self-creatded prison and  40   the stars

27（）

A. ought to 

B. might well

C. would rather

D.had better

乐果或1605中毒洗胃应禁用

A．清水
B．生理盐水
C．1%盐水
D．1:15000高锰酸钾
E．2%碳酸氢钠

可选的处理方案是

A．镇静剂、保胎治疗

B．立即终止妊娠

C．剖宫产

D．止血

E．输血

阅读下面选段，回答问题。

　　【甲】_______集上，见范进正在一个庙门口_______，散着头发，满脸污泥，鞋都_______了一只，兀自拍着掌，口里叫道：“中了！中了！”胡屠户凶神似的_______跟前，说道：“该死的畜生！你中了甚么？”一个嘴巴打将去。众人和邻居见这模样，忍不住的笑。不想胡屠户虽然大着胆子打了一下，心里到底还是怕的，那手早颤起来，不敢打到第二下。

　　【乙】香菱听了，默默的回来，越性连房也不入，只在池边树下，或坐在山石上出神，或蹲在地下抠土，来往的人都诧异。……宝钗笑道：“这个人定要疯了！昨夜嘟嘟哝哝直闹到五更天才睡下，没一顿饭的工夫天就亮了。我就听见他起来了，忙忙碌碌梳了头就找颦儿去。一回来了，呆了一日，作了一首又不好，这会子自然另作呢。”

1．选择恰当的词语填在甲文的横线处。

来到　站着　走到　跨过　跑掉　看到　越过

2．甲段写范进高兴得大叫，而胡屠户则大骂，众人又忍不住地笑。请你谈谈为什么会有这样的表现？

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3．乙段哪些内容表现了香菱的专心作诗？

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4．甲段中，为什么胡屠户“打了一下”后“不敢打到第二下”？

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5．乙段中写香菱“昨夜嘟嘟哝哝直闹到五更天才睡下”。“嘟嘟哝哝”在这里指的是什么？

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6．两个选段在写作上有什么共同之处？

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