试题与答案

一辆汽车的质量为m,额定功率为P,运动中阻力大小为车重的k倍。汽车在水平路面上从

题型:选择题

题目:

一辆汽车的质量为m,额定功率为P,运动中阻力大小为车重的k倍。汽车在水平路面上从静止开始受恒定的牵引力F启动,已知重力加速度为g。则根据上述信息不能求出的是

A.汽车达到额定功率所经历的时间

B.汽车在匀加速过程中牵引力做的功

C.汽车从开始到达到最大速度的过程中所受的阻力做的功

D.汽车运动的最大速度

答案:

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                Welcome Aboard Your Piccadilly Flight To Heathrow
The Piccadilly line to Heathrow(伦敦希思罗机场)is not only the most convenient way to travel but also the most cost-effective. So the next time you’re travelling to Heathrow, make sure you fly Piccadilly line.
Your Piccadilly flight features:
● Departures from 36 stops on the Piccadilly line, or from over 200 stations only one change way
● Service every 5 minutes to and from Heathrow throughout the day
● Journeys from central London taking less than 50 minutes
● Only £ 3.70 for a single adult fare
● See tables below for journey times
Fares to and from central London
● Adult single £3.70
● Child single £1.50
If you are traveling as a group, then you are allowed to use the Family Travelcard, which means each adult can travel for £3.40 and each child for £0. 80.
The group must consist of 1 or 2 adults travelling with 1-4 children(from 09:30 Monday-Friday and at any time weekends and Public Holidays).
Members within the group do not need to be related.
Travelling to Heathrow
 
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Travelling from Heathrow
 
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Earls Court
34 mins
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小题1: Which of the following statements is true about the Piccadilly line?
A.The Piccadilly line is the most convenient one around the world.
B.Taking the Piccadilly line can save more money than any other public transportation.
C.The Piccadilly line is the only public transportation to Heathrow.
D.The flight from Earls Court to Piccadilly Circus takes 39 minutes.
小题2:At what time does the first train from Earls Court arrive at Heathrow on Sunday?
A.07:49B.06:34C.07:54D.06:31
小题3:When taking the Piccadilly line, whether to or from Heathrow, one may___________.
A.get to the destination within 34 minutes
B.get to the first stop no later than 23:30
C.get a discount once traveling in groups
D.expect a train every 5 minutes at the stop
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