问题 选择题

如图所示,用一根硬棒撬一块大石头,当在硬棒的A点上用竖直向下的力F1压硬棒,石头未能撬起,则在力的大小不变的情况下,下列措施中最有效地把石头撬起来的是

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A.把垫着的小石头移近大石头,且用力的方向改为F2所示的方向

B.把垫着的小石头移远大石头,且用力的方向改为F2所示的方向

C.把垫着的小石头移远大石头,且用力的方向仍为竖直向下,即F1所示方向

D.把垫着的小石头移近大石头,且用力的方向仍为竖直向下,即F1所示方向

答案

答案:A

完形填空
Yesterday was my stepmother’s birthday. I haven’t been home for a long time, so I wanted to stop by the house to  36  her on this special day. I have been  37  
on a low income so I was afraid that I couldn’t afford the long  38 . Gas is so expensive nowadays!  39 , I filled my tank with gas and set off.  
I  40  at a shopping mall and found a present. It was the  41  gift and I knew she would love it.  42  when I got to the cashier, my card was 43  !
I didn’t have enough money to  44  the gift!
So I thought about the 45  for a few minutes. I could put it back and get something  46 , but I knew there was 47  else in the store she would have liked as much. So, I transferred some money from my saving account and was able to buy the gift. It took a  48  part of my savings but I wanted her to have something special.
It turned out that she loved the gift and I  49  that even though I had spent almost all my money, my stepmother  50  the best. I was glad I gave her the best I could.
Before I  51  my parents’ house, my dad took me to one side and, with our secret handshake, he gave me some money. I hadn’t  52  anything to him about my financial  53  , but I guessed my dad just knew. When I got to the car, I saw the  54  he gave me was three times what I had spent on the gas and the gift! It shows that doing the right thing always comes with great  55  .
小题1:
A.inviteB.helpC.seeD.drive
小题2:
A.dreamingB.strugglingC.escapingD.improving
小题3:
A.jumpB.meetingC.holidayD.journey
小题4:
A.ThereforeB.MoreoverC.AnywayD.Besides
小题5:
A.stoppedB.leftC.shoutedD.smoked
小题6:
A.perfectB.ordinaryC.handmadeD.free
小题7:
A.ThoughB.SoC.SinceD.But
小题8:
A.goneB.checkedC.refusedD.opened
小题9:
A.hang onB.hand outC.make up D.pay for
小题10:
A.idealB.problemC.reasonD.tour
小题11:
A.betterB.greaterC.cheaperD.smaller
小题12:
A.somethingB.everythingC.nothingD.anything
小题13:
A.wholeB.tinyC.halfD.large
小题14:
A.feltB.advisedC.decidedD.predicted
小题15:
A.acceptedB.deservedC.offeredD.sent
小题16:
A.enteredB.leftC.calledD.visited
小题17:
A.writtenB.promisedC.presentedD.mentioned
小题18:
A.memoryB.conditionC.meansD.future
小题19:
A.benefitB.helpC.amountD.knowledge
小题20:
A.rewardsB.awardsC.risksD.thanks
单项选择题