问题 问答题

小虎和大明进行100m赛跑,小虎跑得快,跑完100m到达终点的时候,大明才跑90m,小虎说:“我们再跑一次,这次你落后10m,下次我的起跑线后退10m,我们还按这回的速度跑,我多跑10m,你和我可以同时到达终点了.”大明却说:“既然要让我10m,你也不用后退,把我的起跑点向前移10m,我少跑10m就得了.”小虎说:“嗨!反正是差10m,我多跑10m,你少跑10m,还不是一回事?”请你想一想,这到底是不是一回事?

答案

(1)根据题意得v=

9
10
v

根据小虎的说法,小虎跑的路程为s=100m+10m=110m,大明跑的路程为s=100m,

那么小虎跑完用的时间为t=

s
v
=
110m
v
,大明跑完用的时间为t=
s
v
=
100m
9
10
v

则t:t=

110m
v
100m
9
10
v
=
110m
v
×
9
10
v
100m
=99:100,

所以按照小虎的说法,他们不会同时到达终点.

(2)按照大明的说法,小虎跑的路程为s′=100m,大明跑的路程为s′=100m-10m=90m,

那么小虎跑完用的时间为t′=

s′
v
=
100m
v
,大明跑完用的时间为t′=
s′
v
=
90m
9
10
v

则t′:t′=

100m
v
90m
9
10
v
=
100m
v
×
9
10
v
90m
=1:1,

所以按照大明的说法,他们会同时到达.

答:他们两人所说的不是一回事.

材料分析题

中国的崛起改变了世界经济发展的格局,同时中国经济地域结构也发生了深刻变化。根据下述资料,结合所学知识,回答

材料一:我国在吸引外资的近30年间,一个总体趋势是外资持续、大量地进入中国。我国利用外资呈现出以下特点和趋势:1.投资规模不断扩大,2.投资方式由中外合资为主转变为外商独资为主。4.投资区域主要集中在东部,但中西部地区投资在逐渐加大。在20世纪80年代,90%以上的外商直接投资分布在沿海地区。在90年代,这个指标略有改善,但基本状况并没有明显变化。截止到2002年底,外商在华累计投资中,在86%的资金投在东部沿海地区,仅有14%的资金投向中西部。

材料二:长江三角洲和珠三角地区经过改革开放以来30多年的非均衡发展,资源短缺、产业同构、产业过度集聚等问题日益严重, 积极推进向中西部地区的产业转移实现地区经济的可持续发展

(1)试分析中西部地区吸引外资落后于东部的原因的主要原因。___________________________________________________________________。

(2)外商在华投资办厂对东部地区的本土企业有何不利影响

___________________________________________________________________。

(3)2008年以来,长江三角洲和珠三角积极推进向中西部地区的产业转移。简述“产业转移”对中西部地区的影响。

___________________________________________________________________。

(4)面对新一轮产业转移,中西部地区该如何做?

___________________________________________________________________。

单项选择题

People have good reason to care about the welfare of animals. Ever since the Enlightenment, their treatment has been seen as a measure of mankind’s humanity. It is no coincidence that William Wilberforce and Sir Thomas Foxwell Buxton, two leaders of the movement to abolish the slave trade, helped found the Royal Society for the Prevention of Cruelty to Animals in the 1820s. An increasing number of people go further: mankind has a duty not to cause pain to animals that have the capacity to suffer. Both views have led people gradually to extend treatment once reserved for mankind to other species.

But when everyday lives are measured against such principles, they are fraught with contradictions. Those who would never dream of caging their cats and dogs guzzle bacon and eggs from ghastly factory farms. The abattoir and the cattle truck are secret places safely hidden from the meat-eater’s gaze and the child’s story book. Plenty of people who denounce the fur-trade (much of which is from farmed animals) quite happily wear leather (also from farmed animals).

Perhaps the inconsistency is understandable. After hundreds of years of thinking about it, people cannot agree on a system of rights for each other, so the ground is bound to get shakier still when animals are included. The trouble is that confusion and contradiction open the way to the extremist. And because scientific research is remote from most people’s lives, it is particularly vulnerable to their campaigns.

In fact, science should be the last target, wherever you draw the boundaries of animal welfare. For one thing, there is rarely an alternative to using animals in research. If there were, scientists would grasp it, because animal research is expensive and encircled by regulations. Animal research is also for a higher purpose than a full belly or an elegant outfit. The world needs new medicines and surgical procedures just as it needs the unknowable fruits of pure research.

And science is, by and large, kind to its animals. The couple of million (mainly rats and mice) that die in Britain’s laboratories are far better looked- after and far more humanely killed than the billion or so (mainly chickens ) on Britain’s farms. Indeed, if Darley Oaks makes up its loss of guinea pigs with turkeys or dairy cows, you can be fairly sure animal welfare in Britain has just taken a step backwards.

The inconsistency in our routine lives is defined by enumerating()

A. the deeds conducted by Sir Thomas Foxwell Buxton

B. the people who condemn the fur-trade but merrily wear leather

C. the understanding of the ancient times concerning a system of rights

D. the comprehension of the way to the extremist