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   She looks up now,catching me 27   at her, causing her to say to her mother." Mom, Dad’s looking at me 28   .

  The last few days,I touch her arm,her face一anything-  29   that when my wife and I return home,she will not be with and there will be nothing to30   .I have so much to say, but no31   with which to say it

   My32   changed from the day I drove this child home from the hospital. I saw myself33   that day, and it has led to a lot of places that I would never have found on my own .

   She says,“It'll be all right,Dad.I’ll be home from school 34   .”I tell her she will have a great year but I say little else.I am afraid somehow to speak and I only hold on to our good-bye hug a little longer, a little35   .

I gaze into her eyes and 36   to go. My wife’s eyes follow her as she leaves us.37   do not.Maybe if I don’t look,I can imagine that she really hasn’t38   ;I know that what she is embarking upon (開始)is exciting and wonderful.I remember what the world looked like to me39   everything was new.

   As I walk to the car with my wife at my side,my eyes are wet,my heart is sore,and I realize that my life is 40   forever.

21.A.sister’s         B.teacher's        C.mother's        D.roommate's

試題詳情

11. 一條長為的線段夾在互相垂直的兩個平面、之間,AB與所成角為,與所成角為,且,,、是垂足,求(1)的長;(2)所成的角

試題詳情

10.在三棱臺中,側(cè)棱⊥底面,且,

(1)求證:,,

(2)求異面直線的距離.

試題詳情

9.已知不共面的三條直線、相交于點(diǎn),,,,,求

試題詳情

8.兩條異面直線、間的距離是1cm,它們所成的角為600、上各有一點(diǎn)A、B,距公垂線的垂足都是10cm,則A、B兩點(diǎn)間的距離為____________________.

試題詳情

7.在棱長為的正四面體中,相對兩條棱間的距離為________________.

試題詳情

6.在正三棱柱中,若,則所成的角的大小    

試題詳情

5.已知異面直線a與b所成的角為500,P為空間一點(diǎn),則過點(diǎn)P與a、b所成的角都是300的直線有且僅有(    )

1條     2條      3條       4條

試題詳情

4.已知直線a,如果直線b同時滿足條件:①a、b異面②a、b所成的角為定值③a、b

間的距離為定值,則這樣的直線b有(     )

1條     2條      4條       無數(shù)條

試題詳情

3.AB、CD在平面α內(nèi),AB//CD,且AB與CD相距28厘米,EF在平面α外,EF//AB,且EF與AB相距17厘米,EF與平面α相距15厘米,則EF與CD的距離為(   )

25厘米    39厘米    25或39厘米   15厘米

試題詳情


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