题目

甲、乙两车某时刻由同一地点沿同一方向开始做直线运动，若以该时刻作为计时起点，得到两车的位移—时间图象如图1所示，则下列说法正确的是 ( )A．t1时刻两车相距最远B．t1时刻乙车追上甲车C．t1时刻两车的速度刚好相等D．0到t1时间内，乙车的平均速度小于甲车的平均速度 答案：B   　　For over twenty years Super Tours have been planning holidays to suit people's needs. We don't offer to do the impossible, we just want to 1 ourselves. It is the 2 duty of our party leaders to make 3 that your holiday is a success. This year we have planned a number of tours to the Continent for people 4 in seeing the capitals of Europe, and for those 5 prefer to do something more energetic, we offer a wide 6 of holidays 7 our trained experts will be ready to give you all the help you need. We'd like to please. 　　If you haven't 8 decided on your holiday , why not 9 this brochure (小册子) ? When you have 10 your choice, telephone us 11 we shall be happy to help you in every way 12 , but we do advise you 13 early. There is no need to 14 about cancellation (取消). If you wish to change your booking at a later date, all you have to do is to let us know 15 in writing. We will do our 16 to satisfy you, but 17 we are unfortunately forced to make a small extra 18 . We do, 19 , keep the 20 to make changes of timetable if this becomes necessary thanks to the situation beyond our control. 1． [　　] A．planB．appreciate C．enjoyD．make 2． [　　] A．personalB．people's C．separateD．entire 3． [　　] A．usefulB．sure C．exactD．valuable 4． [　　] A．tiredB．bored C．funnyD．interested 5． [　　] A．whoB．which C．whomD．they 6． [　　] A．kindsB．deal C．numberD．matter 7． [　　] A．whereverB．whenever C．whereD．when 8． [　　] A．stillB．already C．neverD．yet 9． [　　] A．look forward toB．look through (查阅) C．look outD．look for 10． [　　] A．doneB．made C．acceptedD．agreed 11． [　　] A．soB．but C．orD．and 12． [　　] A．we canB．in that we can C．which we canD．which we can in 13． [　　] A．bookB．booked C．to bookD．booking 14． [　　] A．bringB．worry C．talkD．ask 15． [　　] A．by farB．by chance C．at firstD．at once 16． [　　] A．advertisementB．best C．favourD．adventure 17． [　　] A．for the presentB．for the moment C．for this reasonD．for this service 18． [　　] A．chargeB．change C．moneyD．price 19． [　　] A．howeverB．and C．orD．but 20． [　　] A．dutyB．truth C．powerD．right