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

问题:

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

考点:功率
题型:选择题
已知A、B、C三点共线,且A、B、C三点的纵坐标分别为2、5、10,则点A分
BC
所成的比是 ______.
题型:选择题

设计方依据建设行政主管部门批准的方案才能进入( )阶段。

A.建设准备
B.建设实施
C.初步设计
D.设计文件

题型:选择题
                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
 
Mon-Sat
Sun
From
Journey Time
Frequency
First Train
Last Train
First Train
Last Train
Earls Court
39 mins
5 mins
05:55
00:43
07:15
23:49
Piccadilly Circus
49 mins
5 mins
05:45
00:32
07:05
23:38
Travelling from Heathrow
 
Mon-Sat
Sun
To
Journey Time
Frequency
First Train
Last Train
First Train
Last Train
Earls Court
34 mins
5 mins
05:13
23:49
05:57
23:30
Piccadilly Circus
45 mins
5 mins
05:13
23:49
05:57
23:30
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
题型:选择题

下列哪种疾病与食用已故亲人的脑组织有关()

A.克-雅病

B.库鲁病

C.疯牛病

D.新变异型克-雅病

E.杰茨曼-斯脱司勒-史茵克综合征

题型:选择题

某班有三个小组,赵、钱、孙三人分属不同的小组。这次语文考试成绩公布,情况如下:赵和三人中的第3小组那位不一样,孙比三人中第1小组的那位的成绩低,三人中第3小组的那位比钱分数高。若赵、钱、孙三人按语文成绩由高到低排列,正确的是()。

A.赵、钱、孙

B.赵、孙、钱

C.钱、赵、孙

D.孙、赵、钱

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