利用右图装置，可以除去气体中的杂质：写出除去下列气体中的杂质所用试剂及方程式，（

发布时间：2017-07-02 22:35 │ 来源：www.tikuol.com

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问题：

利用右图装置，可以除去气体中的杂质：写出除去下列气体中的杂质所用试剂及方程式，（括号内的气体为杂质）．

（1）CO₂（HCl）______，反应的离子方程式为______，不能用NaOH溶液的原因是______，也不能用Na₂CO₃的原因是______（均用离子方程式表示原因）．

（2）NO（NO₂）______，化学方程式______．

考点：一氧化氮二氧化氮气体的收集、净化、干燥

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阅读下文，掌握其大意，然后从各题所给的四个选项中选出一个最佳答案。

    Once upon a time, some children 1 at seaside when they found a turtle (海龟). They began to beat the
turtle. Just at that time, a young man came and said to them, "Stop!" The children ran away 2 . The turtle was
very thankful and said, "Thanks for your 3 . I really would like   4 you to a wonderful palace now."
    The young man rode on the back of the turtle and was taken to the secret palace in the sea. When he   5 the
palace, he was very surprised and said to the turtle " 6 nice palace!" To thank him, the king of the turtles gave
him a very   7 dinner. He had never seen   8   a dinner before. He received a warm welcome there and was very
pleased   9 everything.
    After dinner, the king of the turtles said, "I am going to give you two boxes,   10 you can open only one."
"You mustn't open both. Don't forget it!" the turtle warned him. "All right. I will open only one." The young man
promised. At this time, a large wave sent him out of the sea.
    After he went back home, he opened the   11 one of the two boxes. To his surprise the box was full of gold.
"My God!" he cried. "I'm a rich man now." Then he thought, "Things in the other small box must be expensive,
too." He could not wait   12 . He broke his promise and opened the other box. As soon as he opened it, he
became an old man. His hair turned white. His face looked like an old man over eighty years old. It all happened
in a moment. He was sorry for what he did, but it was too late.

( ) 1. A. played
( ) 2. A. quickly
( ) 3. A. kind
( ) 4. A. to introduce
( ) 5. A. left for
( ) 6. A. How
( ) 7. A. rich
( ) 8. A. so
( ) 9. A. to
( ) 10. A. and
( ) 11. A. big
( ) 12. A. no longer

B. were playing
B. slowly
B. helpful
B. to want
B. arrived at
B. How a
B. poor
B. such
B. for
B. but
B. bigger
B. at all

C. play
C. sadly
C. news
C. to invite
C. got on
C. What
C. bad
C. even
C. with
C. or
C. biggest
C. any longer

D. will play
D. happily
D. kindness
D. to let
D. went to
D. What a
D. small
D. very
D. in
D. as
D. smaller
D. more

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北宋中期出现了严重社会危机，其根源有

①宋初加强中央集权的措施

②不抑兼并的政策

③重武轻文，地方割据严重

④经济停滞不前[ ]

A．①②

B．③④

C．①④

D．②③

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计算：(0.0081)-

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下列有关的生活实例与其所运用的物理知识的说法中，正确的是（　　）

A．自行车坐垫呈马鞍型，是为了增大受力面积减小臀部所受的压力

B．三峡船闸是连通器的应用

C．修盘山公路，利用了高度一定时斜面越长越省力的道理

D．静止在水平地面上的汽车，其对面的压力与地面对它的支持力是一对平衡力

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越来越多的有说服力的统计数据表明，具有某种性格特征的人易患高血压，而另一种性格特征的人易患心脏病，如此等等。因此，随着对性格特征的进一步分类研究，通过主动修正行为和调整性格特征以达到防治疾病的可能性将大大提高。以下哪项，最能反驳上述观点

A．一个人可能会患有与各种不同性格特征均有关系的多种疾病。

B．某种性格与其相关的疾病可能由相同的生理因素导致。

C．通过对某一地区的调查数据进行统计分析，不能得出题干所说的某种性格特征的人易患高血压的结论。

D．人们往往是在病情已难以扭转的情况下，才愿意修正自己的行为，但为时已晚。

E．用心理手段医治与性格特征相关的疾病的研究在我国已有多年历史，但众说纷纭，莫衷一是。

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