跳伞运动员在空中张开降落伞后，会做一段速度不断减小的运动，在此过程中他的[ ]

发布时间：2017-07-19 20:18 │ 来源：www.tikuol.com

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问题：

跳伞运动员在空中张开降落伞后，会做一段速度不断减小的运动，在此过程中他的[ ]

A．动能减小，重力势能减小，机械能减小

B．动能减小，重力势能增大，机械能不变

C．动能减小，重力势能不变，机械能减小

D．动能不变，重力势能减小，机械能减小

考点：势能大小的比较动能大小的比较

题型：选择题

假分数的倒数可能是真分数，也可能是假分数．______．

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完形填空。

     The first event of my life to be printed into my memory occurred when I was three. My mother stands,
working in the  1 and then glances at me with a   2 smile. Two feet down the table, I knock on a chair with
a bowl and a spoon,   3 my own invisible (无形的) powder. We wear   4 dresses, mine the leftover   5 from
hers, sky blue-mommy's favorite color. I am her shadow.
     However, by 14 I could not   6   my mother. All that I heard every day was no.I wanted to dye my hair and
she said no. I wanted to   7 late with my friends and she said no. I didn't understand why she said no. She was
trying to  8 me from aches and pains and mistakes   9 in her teens. Several years later, I finally understood her, but it was too late. She became ill. I cried and  10 ,"Don't take her, God, please! She is my mother, my mommy
, the woman who gave me life. All my years,   11 the bad times and the good, she has been there,  12 to me
forever by an invisible umbilical cord (脐带) that lasts longer after birth." But this cord, this love could do nothing to stop the cancer from 13 .
      A few years later  14   I myself lay in the hospital bed, my newly born daughter was   15 in my arms. cried
and smiled and prayed. Please help me to   16 her into a wonderful girl. And looking down   17 her eyes, I
could see the message they held, "Your   18 would be proud."
     I stand in the kitchen now, and these thoughts flashed through my mind. I glance at my young daughter. A
   19 feeling rushes through my soul as I take in the familiar  20 . I am my mother's shadow.

( ) 1. A. kitchen
( ) 2. A. lovely
( ) 3. A. preparing
( ) 4. A. same
( ) 5. A. material
( ) 6. A. stand
( ) 7. A. keep up
( ) 8. A. save
( ) 9. A. watched
( )10. A. screamed
( )11. A. through
( )12. A. connected
( )13. A. spreading
( )14. A. when
( )15. A. placed
( )16. A. change
( )17. A. for
( )18. A. daughter
( )19. A. warm
( )20. A. saying

B. dining room
B. lively
B. mixed
B. similar
B. clothes
B. agree
B. keep on
B. warn
B. liked
B. said
B. in
B. shared
B. growing
B. before
B. given
B. support
B. through
B. mother
B. strange
B. scene

C. sitting room
C. loving
C. mixing
C. different
C. dress
C. know
C. stay up
C. help
C. heard
C. shouted
C. on
C. concerned
C. escaping
C. since
C. thrown
C. bring
C. up
C. children
C. painful
C. drawing

D. garden
D. horrible
D. prepared
D. matching
D. clothing
D. realize
D. stay out
D. stop
D. experienced
D. prayed
D. within
D. joined
D. moving
D. then
D. taken
D. raise
D. into
D. friends
D. exciting
D. paint

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いつか　（　　　　）へ　いって　みたいです。

A．シャンプー

B．インド

C．エンジン

D．タイプライター

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建设用地管理

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留园全园以水为中心，突出水的主题。( )

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