阅读理解
When people go to England, they must leam something about transportation there.
In England,cars,buses and bikes must keep to the left side of the street. If a person wishes to cross
a street, he must stop and either look at the traffic lights or look both ways down the street. And instead
of looking left first,as we do in China,they look right first.
To get about in London, vis]tors should leam to use buses and the underground'. First of all they
must know which direction(方向)they are going to and which bus underground train they must take. At
the bus stop they wait for buses to come. As soon as they get on the bus, they must pay for their
tickets.
根据短文内容判断正“T”，误“F”。
( )1. In England,people go along the left side of the road as we do in China.
( )2. When they want to cross a street,people in England look right first.
( )3. To go about in London,visitors should learn to drive.
( )4. First of all,visitors must know where to go..
( )5. After people get on a bus,they don-t have lo pay for their tickets at once.
“交流”）电源，它每隔0.02s打一次点．图示是实验得到的一条点迹清晰的纸带，A、B、C、D为四个计数点，相邻两个计数点之间还有4个点未画出，则相邻两个计数点间的时间间隔是 s．经测量知道AB＝2.20cm，BC＝3.80cm，根据以上数据，可知打点计时器打下B点时物体的速度等于________m/s． 