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 (开始)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
11. 一条长为的线段
夹在互相垂直的两个平面
、
之间,AB与
所成角为
,与
所成角为
,且
,
,
,
、
是垂足,求(1)
的长;(2)
与
所成的角
10.在三棱台
中,侧棱
⊥底面
,且
,
.
(1)求证:,
,
.
(2)求异面直线和
的距离.
9.已知不共面的三条直线、
、
相交于点
,
,
,
,
,求
8.两条异面直线、
间的距离是1cm,它们所成的角为600,
、
上各有一点A、B,距公垂线的垂足都是10cm,则A、B两点间的距离为____________________.
7.在棱长为的正四面体中,相对两条棱间的距离为________________.
6.在正三棱柱中,若
,则
与
所成的角的大小 .
5.已知异面直线a与b所成的角为500,P为空间一点,则过点P与a、b所成的角都是300的直线有且仅有( )
1条
2条
3条
4条
4.已知直线a,如果直线b同时满足条件:①a、b异面②a、b所成的角为定值③a、b
间的距离为定值,则这样的直线b有( )
1条
2条
4条
无数条
3.AB、CD在平面α内,AB//CD,且AB与CD相距28厘米,EF在平面α外,EF//AB,且EF与AB相距17厘米,EF与平面α相距15厘米,则EF与CD的距离为( )
25厘米
39厘米
25或39厘米
15厘米
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