TPO12 Reading1 Q12

izayakUID: 3285759

About 90 percent of modern humans are right-handed: we are the only mammal with a preferential use of one hand. The part of the brain responsible for fine control and movement is located in the left cerebral hemisphere, and the findings above suggest that the human brain was already asymmetrical in its structure and function not long after 2 million years ago. Among Neanderthalers of 70,000 – 35,000 years ago, Marcellin Boule noted that the La Chapelle-aux-Saints individual had a left hemisphere slightly bigger than the right, and the same was found for brains of specimens from Neanderthal, Gibraltar, and La Quina.

12. What is the author's primary purpose in paragraph 7?
○ To illustrate the importance of studying the brain
○ To demonstrate that human beings are the only mammal to desire fine control of movement
○ To contrast the functions of the two hemispheres of the brain
○ To demonstrate that right-hand preference has existed for a long time

izayakUID: 3285759

答案为D
排除可得，可是怎么能从left brain bigger than the right直接推出有right hand preference呢？

左脑是fine control of movement，又不是fine control of right hand movement。。。

rexue70UID: 3374501

对身体的控制，左脑控制右边，右脑控制左边。  common sense
用的多的大脑部分发达，所以左边大脑发达的意思就是右手preference

izayakUID: 3285759

rexue70 发表于 2013-8-19 20:01
对身体的控制，左脑控制右边，右脑控制左边。  common sense
用的多的大脑部分发达，所以左边大脑发达的意 ...

不是不许common sense么……

而且这个至多可以算是同时发生，不能证明因果呀

izayakUID: 3285759

rexue70 发表于 2013-8-19 20:01
对身体的控制，左脑控制右边，右脑控制左边。  common sense
用的多的大脑部分发达，所以左边大脑发达的意 ...

顺便再问一个问题~

还是TPO12
R3 最后一段
Water does not remain immobile in an aquifer but can seep out at springs or leak into other aquifers. The rate of movement may be very slow: in the Indus plain, the movement of saline (salty) ground waters has still not reached equilibrium after 70 years of being tapped. The mineral content of groundwater normally increases with the depth, but even quite shallow aquifers can be highly saline.
这个euilibrium是盐度没有达到正常水平？

crazyrobinUID: 2368627

请看第一句话

About 90 percent of modern humans are right-handed

后面一个冒号解释，这个主旨还能选啥。。。。

izayakUID: 3285759

crazyrobin 发表于 2013-8-19 22:54
请看第一句话

....这样简单粗暴...
恩...