右图是甲、乙两种固体物质的溶解度曲线．请回答：甲物质在45℃时的溶解度为____

发布时间：2017-07-30 22:21 │ 来源：www.tikuol.com

题型：填空题

问题：

右图是甲、乙两种固体物质的溶解度曲线．请回答：甲物质在45℃时的溶解度为______g；甲、乙两物质的溶解度相等的温度是______℃；要使乙的不饱和溶液变为饱和溶液应______（填“升高”、“降低”）温度；常压下，CO₂在水中的溶解度随温度的变化应类似于______（填：“甲”、“乙”）曲线．

考点：固体溶解度

题型：填空题

宋朝形成了“中书主民，枢密院主兵，三司主财，各不相知”的局面。这反映出 [ ]

A．宰相职权范围扩大

B．专制皇权达到顶峰

C．君权对相权的制约

D．中央对地方控制加强

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题型：填空题

完形填空。

      In the early 1800's, a boy named John lived in an orphanage (孤儿院) with several other children. Every
day was   1   working and Christmas was the one day of the year   2   the children did not work and received
a gift - an orange. The children   3   it so much that they kept it for weeks, and even   4  -smelling it,   5 it
and loving it. Usually they tried to preserve (保护) it for so   6   that it often went bad before they ate it.
      This year John knew he would soon be   7   enough to leave. He would save the orange until his birthday
in July. If he preserved it   8 , he might be able to eat it on his birthday.
      Christmas day finally came. The children were so   9   as they entered the dining hall. In his excitement,
John knocked over something, causing a big  10 . Immediately the master shouted, "John, leave the hall and
there will be no orange for you." John's heart  11 . He turned and ran back to the  12  room so that the
children wouldn't see his tears.
      Then he heard the door open and the children entered. Little Elizabeth with a  13  on her face held out her
small hands. "Here John," she said, "this is for you." As John  14  his head, he saw a big juicy  15  all peeled
and quartered … Each child had sacrificed (舍弃) their own orange by  16  a quarter and had created a big,
beautiful orange for him.
      John never forgot the sharing, love and personal  17  his friends had shown him that Christmas day.  18
that day, after he became rich, every year he  19  send oranges all over the world to children everywhere.
His  20  was that no child would ever spend Christmas without a special Christmas fruit!

( )1. A. forced
( )2. A. as
( )3. A. needed
( )4. A. months
( )5. A. tasting
( )6. A. much
( )7. A. old
( )8. A. seriously
( )9. A. nervous
( )10. A. cry
( )11. A. jumped
( )12. A. cold
( )13. A. look
( )14. A. shook
( )15. A. gift
( )16. A. sharing
( )17. A. feelings
( )18. A. In return for
( )19. A. must
( )20. A. desire

B. passed
B. when
B. wanted
B. days
B. watching
B. soon
B. strong
B. carefully
B. excited
B. disappointment
B. stopped
B. small
B. tears
B. lifted
B. surprise
B. breaking
B. affairs
B. In case of
B. would
B. idea

C. taken
C. while
C. valu ed
C. years
C. pressing
C. long
C. tall
C. secretly
C. pleasant
C. surprise
C. broke
C. old
C. comfort
C. put
C. orange
C. eating
C. relation
C. In memory of
C. might
C. meaning

D. spent
D. which
D. liked
D. seasons
D. touching
D. far
D. experienced
D. softly
D. eager
D. noise
D. settled
D. lonely
D. smile
D. turned
D. wonder
D. taking
D. sacrifice
D. In search of
D. should
D. thinking

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题型：填空题

人的素质最佳可塑期与年龄有关。下列哪个科学家做的年龄和创造性成就之间关系的研究，表明了这种重要性。（）

A.罗夏

B.卡特尔

C.冯特

D.莱曼

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题型：填空题

专业无线传声器系统中，接收机接收的是（）。

A、调相信号

B、调角信号

C、调幅信号

D、调频信号

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题型：填空题

药材秦皮的主要化学成分类型是（）

A.香豆素类

B.甾体类

C.挥发油类

D.脂肪烃类

E.皂苷类

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