如图为某小球从斜面某点无初速度释放、向下做匀加速直线运动的频闪照片,已知频闪相机

题型:计算题

问题:

如图为某小球从斜面某点无初速度释放、向下做匀加速直线运动的频闪照片,已知频闪相机从小球下滑至A点开始拍摄,此后每隔0.1s曝光一次,测得图中AB=12cm,BC=20cm。求:

小题1:小球在图中B点的速度大小;

小题2:小球运动的加速度大小及A点离释放点的距离。

考点:匀变速直线运动
题型:计算题

观察下列等式:12+(1×2)2+22=9=(12+1+1)2,22+(2×3)2+32=49=(22+2+1)2,32+(3×4)2+42=169=(32+3+1)2,42+(4×5)2+52=441=(42+4+1)2,52+(5×6)2+62=961=(52+5+1)2,…

(1)根据以上运算,你发现了什么规律,用含有n(n为正整数)的等式表示该规律;

(2)请用分解因式的知识说明你发现的规律的正确性.

题型:计算题
It was a cold winter. The day my husband fell to his death, it started to snow, just 36 any November day. His 37 , when I found it, was lightly covered with snow. It snowed almost every day for the next four months, while I sat on the couch and watched it 38 . One morning, I walked slowly 39 and was surprised to see a snow remover clearing my driveway and the bent back of a woman clearing my walk. I dropped to my knees and crawled back upstairs, 40 those good people would not see me. I was 41 . My first thought was, how would I ever 42 them? I didn’t have the 43 to brush my hair, 44 clear someone’s walk.
Before Jon’s death, I felt proud that I 45 asked for favors. I identified myself by my competence(能力) and 46 . So who was I if I was no longer capable? How could I 47 myself if I just sat on the couch every day and watched the snow fall?
Learning to receive the love and 48 from others wasn’t easy. Friends cooked for me and I cried. Finally, my friend Kathy said, “Mary, cooking for you isn’t a 49 for me; it makes me feel good to be able to do something for you.”
Over and over, I heard 50 words from the people who supported me during those 51 days. One wise man told me, “You aren’t doing nothing because being fully open to your 52 may be the hardest work you will ever do.”
I am not the person I 53 was, but in many ways I have changed for the 54 . I’ve been surprised to learn that there is incredible freedom coming from 55 one’s worst fear and walking away whole. I believe there is strength, for sure, in accepting a dark period of our life.
小题1:
A.onB.inC.likeD.for
小题2:
A.bodyB.soulC.shoeD.footprint
小题3:
A.sweep upB.drop offC.fall downD.pile up
小题4:
A.upstairsB.downstairsC.indoorsD.outdoors
小题5:
A.soB.yetC.andD.for
小题6:
A.delightedB.disappointedC.annoyedD.ashamed
小题7:
A.payB.awardC.rewardD.treat
小题8:
A.courageB.strengthC.spiritD.power
小题9:
A.stand aloneB.leave aloneC.sit aloneD.let alone
小题10:
A.frequentlyB.graduallyC.hardlyD.uncertainly
小题11:
A.intelligenceB.independenceC.excellenceD.qualification
小题12:
A.achieveB.praiseC.respectD.promote
小题13:
A.supplyB.supportC.contributionD.similar
小题14:
A.burdenB.jobC.businessD.sorrow
小题15:
A.sensitiveB.sameC.considerateD.similar
小题16:
A.blueB.rainyC.brightD.snowy
小题17:
A.despairB.difficultyC.painD.regret
小题18:
A.stillB.onceC.evenD.never
小题19:
A.worseB.lessC.moreD.better
小题20:
A.facingB.noticingC.managingD.expressing
题型:计算题

活性碳处理水主要用于吸附水中的颗粒物质,天然的混浊水可直接用活性碳进行予处理。

题型:计算题

从事生产、经营的纳税人应当自开立基本存款账户或者其他存款账户之日起15日内,向主管税务机关书面报告其全部账号;发生变化的,应当自变化之日起15日内,向主管税务机关书面报告。

题型:计算题

(-123)10的原码是()。

A.11111011

B.01111011

C.01111101

D.10000100

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