题目

甲、乙两小车同时同地同方向做匀速直线运动，它们的s-t图象分别如图4  （A）和（B）所示。则下列说法正确的是 （ ）   A．甲车速度小于乙车速度          B．甲车速度是4米/秒   C．甲车运动4秒后路程是1.5米    D．10秒两车相距3米 答案：D   阅读 Modern life is impossible without travellingThe fastest way of traveling is by planeWith a modern airliner(客机) it takes one day to travel to places which took a month or more to get to a hundred years ago Travelling by train is slower than by plane,but it has its advantages(优点)You can see the country you are travelling throughModern trains have comfortable(舒适的) seats and dining carsThey make even the longest journey enjoyable Some people prefer to travel by sea when possibleThere are large liners and river boatsYou can visit many other countries and different parts of your country on themShips are not as fast as trains or planes,but travelling by sea is a very pleasant way to spend a holiday Many people like to travel by carYou can make your own timetableYou can travel three or four hundred miles or only fifty or one hundred miles a day,just as you likeYou can stop wherever you wish-where there is something interesting to see,at a good restaurant where you can enjoy a good meal,or at a hotel where you can spend the nightThat is why travelling by car is a popular pleasant trip,while people usually take a train or a plane when they are travelling on business uu内eP断(T)误(F) ()lThe fastest way of travelling is by plane ()2If we travel by car,we can make the longest holiday enjoyable ()3When people travel on business,they usually take a bus or a car ()4They means comfortable seats and dining cars ()5In this passage,the writer talked about three ways of travelling (　　)