问题 单项选择题

环形跑道长400米,老张、小王、小刘从同一地点同向出发,围绕跑到分别慢走、跑步和骑自行车。已知三人的速度分别是1米/秒、3米/秒和6米/秒,问小王第3次超越老张时,小刘已经超越了小王多少次?

A.3 

B.4 

C.5 

D.6

答案

参考答案:B

解析:解析 由路程差=速度差×时间,可得1200=(3-1)×t,解得t=600秒。再由上述公式可解得小刘与小王的路程差=(6-3)×600=1800米,即4圈。因此,答案选择B选项。(另外,本题可直接由比例法求解:速度差之比为3:2,所以路程差之比亦为3:2,故小刘比小王多跑了4.5圈。) 考点:行程问题

完形填空
Dick was born in a small town. He was a very clever boy, but his  36 was very poor, so he had to work in his  37 time, and during his holidays too, to pay for his  38 . In spite of this, he  39 to get to the university. But it was so  40 to study there that during the holidays he had to get two jobs at the  41 time so as to earn  42 money for his studies.
One summer he managed to get a job in a butcher’s shop during the daytime and  43 in a hospital at night, In the shop, he learned to cut meat up quite nicely and the butcher liked him very much and often  44 him do all the serving.
In the hospital, on the other hand, he was,  45 , allowed to do the  46 jobs, like helping to lift  47 and to carry them from one part of the hospital to another.
One evening at the hospital, Dick had to help to carry a woman from her bed to the  48 room. The woman  49 to be one of his  50 who used to buy meat at the butcher’s shop. She was already feeling  51 at the thought of the operation  52 he came to get her. And when she  53 Dick, it seemed to her  54 that nearly finished her.
“ No, no!” she cried. “Not the butcher! I won’t be operated on by the butcher!” And she  55 her eyes painfully.
小题1:
A.homeB.houseC.familyD.village
小题2:
A.spareB.restC.activeD.lunch
小题3:.
A.toysB.educationC.schoolD.clothes
小题4:
A.managedB.triedC.failedD.wasn’t able
小题5:
A.freeB.hardC.easyD.expensive
小题6:.
A.otherB.lastC.differentD.same
小题7:
A.enoughB.muchC.a littleD.most
小题8:
A.the othersB.anotherC.othersD.other
小题9:
A.didn’t haveB.helpedC.letD.begged
小题10:
A.in allB.actuallyC.of courseD.sometimes
小题11:.
A.lightB.simplestC.difficultD.different
小题12:
A.doctorsB.knivesC. toolsD.people
小题13:
A.livingB.sitting C.operatingD.waiting
小题14:
A.happenedB.hatedC.seemedD.remembered
小题15:.
A.neighboursB.teachersC.friendsD.customers
小题16:
A.unhappyB.sadC.surprisedD.frightened
小题17:
A.beforeB.afterC.untilD.for
小题18:
A.spoke toB.toldC.sawD.refused
小题19:
A.as ifB.even ifC.what ifD.if only
小题20:.
A.startedB.glaredC.openedD.shut
问答题