现有Na、O、C、H五种元素，请选用其中一种或几种元素写出符合下列要求的化学式各

发布时间：2017-08-07 10:06 │ 来源：www.tikuol.com

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问题：

现有Na、O、C、H五种元素，请选用其中一种或几种元素写出符合下列要求的化学式各一个：

（1）碘酒中的溶剂是______；（2）汽水中含有的酸______；

（3）厨房清洁剂中含有的碱______；（4）溶液能使无色酚酞变红的盐______．

考点：溶液的定义、组成及特征化学式的写法和意义酸的用途碱的用途盐的用途

题型：问答题

K线图上表现出来的十字线，表示（）。

A.股价上涨幅度大

B.股价下跌幅度大

C.股价震荡，收盘与开盘不等价

D.股价震荡，收盘与开盘等价

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长方形长为

cm，宽为

cm，则面积为______cm．

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阵发性睡眠性血红蛋白尿特异性的诊断依据为（）

A.尿含铁血黄素试验（+）

B.Coombs试验（+）

C.红细胞寿命缩短

D.Ham试验（+）

E.红细胞沉降率增高

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厂外运输方案经济技术比较选择的比较因素不包括( )。

A．运距

B．运力

C．运费

D．运输路线

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完形填空。

     Years ago, if a teenager had some problems in her life, she might go home and write in her diary. Now,
a teenager with   1 problems might go onto the Internet and write about them in a blog. In many ways, a
diary and a blog are very   2  . So, what makes blogging different from writing in   3 diary?
     The biggest difference is that blogging is much more   4   than a diary. Usually, a teenager treats her diary
like a book full of   5 that she does not want to   6 . It's interesting that someone who writes in a blog   7   a
diary will probably write nearly the same information.
     I have a little sister, and sometimes I go online to read her   8 . She writes about things like waking up early
for swimming practice and not studying enough for her chemistry test.   9 I was her age, I wrote about the
same things, but  10  in my diary. Then, after I had finished writing, I would hide my diary in a secret place
because I was  11  that my sister might read it!
     The biggest  12  with blogging is that anyone can read what you write. If I was angry with a friend during
high school and wrote something  13  about her in my diary, she would never know.  14 , if my sister ever
wrote something bad about a friend, that friend  15  read her blog and get a"cry".
     There are also  16  of blogging, of course. If I was feeling sad one day and wrote in my diary,"Nobody
cares about me,"  17  would know about it. However, if my sister wrote the same sentence in her blog, her
best friends would  18  respond (回应) and tell her how much they  19  her. Blogs help people  20  in contact
with their friends and to hear what the people around them are doing.

(      )1. A. similar
(      )2. A. familiar
(      )3. A. a personal
(      )4. A. attractive
(      )5. A. thoughts
(      )6. A. tell
(      )7. A. instead of
(      )8. A. blog
(      )9. A. Although
(      )10. A. only
(      )11. A. angry
(      )12. A. problem
(      )13. A. unpleasant
(      )14. A. Besides
(      )15. A. should
(      )16. A. reasons
(      )17. A. everyone
(      )18. A. happily
(      )19. A. like
(      )20. A. lose

B. troublesome
B. special
B. an ordinary
B. public
B. puzzles
B. share
B. as well as
B. diary
B. Since
B. already
B. concerned
B. doubt
B. wrong
B. However
B. will
B. disadvantages
B. no one
B. especially
B. miss
B. stay

C. difficult
C. similar
C. a common
C. convenient
C. mysteries
C. publish
C. in favor of
C. report
C. When
C. still
C. glad
C. trouble
C. mean
C. Therefore
C. must
C. shortcomings
C. anyone
C. quickly
C. need
C. get

D. daily
D. different
D. a traditional
D. quick
D. secrets
D. solve
D. in spite of
D. web
D. Because
D. never
D. worried
D. mistake
D. funny
D. Then
D. might
D. advantages
D. someone
D. immediately
D. help
D. find

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