问题 实验题

在《探究小车速度随时间变化规律的实验》中得到一条如图所示的纸带,图中O、A、B、C、D、E为选取的计数点,相邻两计数点的时间间隔均为0.1s。计数点D两侧有1、2、3三个计时点,与D构成相邻的计时点,计时点间的时间间隔均为0.02s,其中x=9.60cm。若某同学在实验中算出小车经过各点的瞬时速度并设计了如下表格:

(1)请帮该同学计算D点的瞬时速度并填在表格中;

(2)在给定的坐标纸上建立坐标系和标度并作出小车的v-t图象,由此判断小车做________运动。

答案

(1)1.60 

(2)图“略” ,匀加速直线

完形填空
Last weekend, I was walking across the village green(草坪) when I saw an elderly gentleman on the bench, just overlooking the duck pond. I thought he looked a bit forlorn(被遗弃的) so I went over and sat next to him.
After a few   36   about how nice the weather was and how there were a lot of ducks in the pond today, he told me how he used to come with his wife and watch the children feed the ducks with their mums. They didn't have any   37   of their own..So they cherished being together even more.
He explained he had been married for 54 years   38   his wife died and how much he missed    39    all the little things with her, like a beautiful sunset. He now lives in a care home. I remarked at how wonderful it must've been to have been married for so long and to have so many happy memories. He took out a large    40  and wiped his eyes and said he had one regret that in all that time he   41   told her how much he really loved her.
He showed me a photograph of them when they were young. The photo was taken more than 50 years ago. He couldn't believe how the time had   42  . I tried to comfort him by explaining that his wife would be still    43   over him and he could talk to her   44   he wants and that she knows how much he loved her because she can see into his heart. 
The old man tried to   45   for blurting out his life story but I hushed him and said how privileged I felt he could talk to me and how much it meant to me.
The   46   I learned from this chance encounter is that we must tell the ones close to us how much we love and care for them and not take them for granted.
Don't   47   your kind acts until tomorrow; do them today because time flies.
小题1:
A.discussionB.commentsC.quarrelsD.communication
小题2:
A.childrenB.ducksC.pondD.home
小题3:
A.beforeB.whenC.afterD.unless
小题4:
A.doingB.carryingC.sharingD.buying
小题5:
A.paperB.rubber C.brushD.handkerchief
小题6:
A.neverB.oftenC.sometimesD.constantly
小题7:
A.passed onB.passed awayC.passed byD.passed off
小题8:
A.watchingB.lookingC.seeing D.observing
小题9:
A.every timeB.any timeC.some timeD.the time
小题10:
A.blameB.cryC.regretD.apologize
小题11:
A.thingB.classC.lesson D.knowledge
小题12:
A.put upB.put downC.put awayD.put off
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