问题 阅读理解

阅读理解。

     A sign showing a no kissing area is pictured at Warrington Bank Quay train station in Warrington.

     Passengers have been told: if you want to get up to that kind of business, do it in the car park.

     The sign has gone up at the drop-off point at Warrington Bank Quay station in the town of Warrington,

between Liverpool and Manchester in northwest England.

     A similar sign, this time permitting kissing, has been put up elsewhere in an area where kissing is

considered bearable.

     "We have not forbidden kissing in the station," said a spokesman for operators Virgin Rail.

     "But we have put the sign up at the drop-off point because it is not a very big area and it often gets busy

with lots of traffic."

     "The sign is a light-hearted way of getting people to move on quickly."

     "If people wish to spend a little more time with their loved ones before they leave, then they should park

in the short-stay car park nearby."

     However, one station is trying to rescue love from the tracks.

     High Wycombe, northwest of London, is having none of it and is actively encouraging passengers to enjoy

it.

     "Kissing is welcome here!... we would never dream of banning kissing," says a poster of a cartoon couple

embracing (拥抱), circled by a pink heart.

     "Railway stations are romantic places," insisted Kirsteen Robertson from Chiltern Railways.

     "They are where fond farewells (告别) take place, where relationships start with a glance and even, in the

case of our Marylebone station last November, where one passenger will suggest to another over the public

address system."

     "So our passengers are more than welcome to share a kiss in our stations."

1. The sign put up at the drop-off point was to ____.

A. blame lovers saying goodbye there

B. avoid the crowdedness of the station

C. advise passengers to slow down

D. let passengers share a kiss at the station

2. We can infer from "having none of it" that ____.

A. the station refuses to accept it

B. the station welcomes it

C. the station considers it unbearable

D. the station forbids it

3. According to Kirsteen Robertson, ____.

A. love from the tracks really sounds reasonable

B. fond farewells are not allowed at the station

C. it's better to go to the car park to stay with lovers

D. signs at Warrington Bank Quay station are useful

答案

1-3: B B A

单项选择题
实验题

某实验小组采用如图所示的装置探究“合外力做功与速度变化的关系”。实验时,先接通电源再松开小车,打点计时器在纸带上打下一系列点。小车所受到的拉力F为0.20N,小车的质量为200g。

(1)实验前,木板左端被垫起一些,使小车在不受拉力作用时做匀速直线运动。这样做的目的是______________。

A.为了平稳摩擦力

B.增大小车下滑的加速度

C.可使得细绳对小车做的功等于合外力对小车做的功

D.可以用质量较小的砝码就可以拉动小车,以满足砝码质量远小于小车质量的要求

(2)同学甲选取一条比较理想的纸带做分析。小车刚开始运动时对应在纸带上的点记为起始点O,在点迹清楚段依次选取七个计数点A、B、C、D、E、F、G,相邻计数点间的时间间隔为0.1s。测量起始点O至各计数点的距离,计算计数点对应小车的瞬时速度、计数点与O点之间的速度平方差、起始点O到计算点过程中细绳对小车做的功。其中计数点D的三项数据没有计算,请完成计算并把结果填入表格中。

(3)以W为纵坐标、以△v2为横坐标在方格纸中作出W-△v2图象。B 、C、E、F四点已经在图中描出,请在图中描出D点,并根据描点合理画出图象。

(4)根据图象分析得到的结论______________。

(5)同学乙提出利用上述实验装置来验证动能定理。如图所示是打点计时器打出的小车在恒力F作用下做匀加速直线运动的纸带,测量数据已用字母表示在图中。小车质量为m,打点计时器的打点周期为T。利用这些数据可以验证动能定理。请你判断这种想法是否可行?如果不行,说明理由。如果可行,写出必要的分析与推理。