利用乘法公式计算:(1)999×1001;(2)(12x-y)2;(2)(12x

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问题:

利用乘法公式计算:
(1)999×1001;
(2)(
1
2
x-y)2

(2)(
1
2
x-y)2
考点:平方差公式完全平方公式
题型:解答题

扑救商场类火灾时担任控制和进攻的水枪,应以喷雾水枪为主。()

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It was in my high school science class. I was doing a task in front of the classroom with my favorite shirt on.
A     came, “Nice shirt,” I smiled from ear to ear. Then another voice said, “That shirt belonged to my dad. Greg’s mother works for my family. We were going to      that shirt away, but gave it to her     .”I was speechless. I wanted to hide.
I      the shirt in the back of the closet and told my mum what had happened. She then dialed her        , “I will no longer work for your family,” she told him. That night, Mom told my dad that she couldn’t clean anymore; she knew her life’s      was something greater.
The next morning she       with the personnel manager at the Board of Education. He told her that without a proper education she could not teach. So mom decided to      a university.
After the first year in college, she went back to the personnel manager. He said, “You are   __   , aren’t you? I think I have a       for you as a teacher’s assistant. This opportunity deals with children who are mentally challenged with little or no chance of      .” Mom accepted the opportunity very      .
For almost five years, as a teacher’s assistant, she saw teacher after teacher give up on the children and quit, feeling      . Then one day, the personnel manager and the principal   __  _  in her classroom. The principal said, “We have watched how you       the children and how they communicate with you and admire your hard – working       over the last five years. We are all in agreement that you       be the teacher of this class.”
My mom spent more than 20 years there.      her career, she was voted Teacher of the Year. All of this came about because of the       comment made in the classroom that day. Mom showed me how to handle       situations and never give up.
小题1:
A.noiseB.voiceC.soundD.tune
小题2:
A.getB.takeC.carryD.throw
小题3:
A.otherwiseB.anyhowC.insteadD.actually
小题4:
A.settledB.pushedC.storedD.stuck
小题5:
A.teacherB.employerC.directorD.adviser
小题6:
A.purposeB.encouragementC.achievementD.victory
小题7:
A.wentB.metC.workedD.stayed
小题8:
A.visitB.continueC.attendD.prepare
小题9:
A.seriousB.fortunateC.carefulD.responsible
小题10:
A.careerB.dutyC.positionD.part
小题11:
A.learningB.judgingC.obeyingD.imagining
小题12:
A.patientlyB.eagerlyC.successfullyD.skillfully
小题13:
A.upsetB.frightenedC.guiltyD.ashamed
小题14:
A.looked upB.went upC.took upD.showed up
小题15:
A.believeB.protectC.treatD.receive
小题16:
A.spiritB.intentionC.actionD.attempt
小题17:
A.mustB.wouldC.mightD.should
小题18:
A.AtB.DuringC.OnD.With
小题19:
A.worthlessB.thoughtlessC.hopelessD.helpless
小题20:
A.challengingB.differentC.dangerousD.strange
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医学科研的根本目的是()

A.揭示生命活动的本质和规律

B.认识疾病发生、发展过程

C.寻找诊治疾病的有效途径

D.探求增进健康的方法

E.维护和增进人类健康,造福人类

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淬透性

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下放车辆时严禁带电下放。

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