什么是抽样?

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问题:

什么是抽样?

考点:通信工程师通信工程师传输与接入通信工程师传输与接入题库
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On my way home I knocked into a stranger as he passed by. “Oh. I’m terribly sorry,” I said. “That’s all right. Please excuse me too; I wasn’t even 26____ you. I wish  I didn’t hurt you.”
We were very  27  . We said good-bye and went on our way.
But at home we often  28 our loved ones in a different way.
Later that day, while I was cooking the evening meal, my daughter stood beside me very quietly. When I turned, I nearly  29 her down. “Move out of the way.” I shouted. She walked away, tears (眼泪) in her eyes.
While I lay awake in bed, I realized how  30  I’d spoken. So I decided to get up to say sorry to my daughter. On the way to her bedroom, to my surprise, I found some  31 by the door of the kitchen. At that time my tears began to fall. I quietly went and got down on my knees by her  32 . She woke up and put her arms around my neck when I kissed her. Then I asked, “Did you pick these flowers for me?”
She smiled, “I found them out by the tree. I picked them  33 they’re pretty like you. I knew you’d like them. I stood quietly in order to give you a surprise.”“Oh dear, I’m really sorry for the way I acted today; I shouldn’t have shouted at you.”
“ That’s okay. Mom. I  34  you anyway.”
I suddenly realized what a clever way it is to explain the word   35  like this: (F) ather (A) nd (M) other, (I) (L) ove (Y) ou!
小题1:
A.savingB.helpingC.callingD.noticing
小题2:
A.sadB.angryC.politeD.proud
小题3:
A.helpB.treatC.criticizeD.encourage
小题4:
A.putB.tookC.turnedD.knocked
小题5:
A.sadlyB.rudelyC.softlyD.calmly
小题6:
A.booksB.clothesC.flowersD.vegetables
小题7:
A.bedB.deskC.chairD.computer
小题8:
A.ifB.thoughC.beforeD.because
小题9:
A.loveB.needC.missD.hate
小题10:
A.fatherB.motherC.familyD.daughter
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如下图所示,甲图是用来使带正电的离子加速和偏转的装置.乙图为该装置中加速与偏转电场的等效模拟.以y轴为界,左侧为沿x轴正向的匀强电场,场强为E。右侧为沿y轴负方向的匀强电场.已知OA⊥AB,OA=AB,且OB间的电势差为U0.若在x轴的C点无初速地释放一个电荷量为q、质量为m的正离子(不计重力),结果正离子刚好通过B点,求:

(1)CO间的距离d;

(2)粒子通过B点的速度大小.

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马克思主义理想信念有哪些特点

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房地产的特性包括()。

A、位置固定性(或不可移动性)

B、独一无二(或异质性、独特性、非同质性、个别性)

C、价值较大

D、易于变现

E、不受限制

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ISSN是指什么?

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