| Ask why most people are right-handed,
and the answer might fall along the same lines as why fish school(鱼成群地游). Two
neuroscientists suggest that social pressures drive individuals to coordinate
their behaviors so that everyone in the group gets an evolutionary
edge. Approximately 85 percent of people prefer their right hand, which is controlled by the left hemisphere of the brain. One theorized benefit of locating a particular function in one hemisphere is that it frees the other to deal with different tasks. But that idea does not explain why. population-wide trends for handedness exist in the first place. Moreover, evidence gleaned in recent years has overturned the long-held belief that human handedness is a unique by-product of brain specialization attributable to language. A suite of studies has revealed brain lateraliz A. it was a necessary evolutionary process B. it has something to do with human right-handedness C. they need to coordinate with other fish D. their brain function is unique [简答题]One might ask why speculation is permitted when there is so real a danger of loss. The basic reason is that speculation can perform useful functions in the market equilibrium and encourages faster entry of more suppliers, ff the price change lagged until after an actual commodity shortage had occurred, the fluctuation would probably be sharper and more sudden. Remedial supply action could not be further delayed. Similarly, if speculators foresee a surplus in some commodity, their selling of futures will help drive the price down to some extent before the surplus actually occurs. When speculators foresee a shortage and bid up the price, they are also helping to conserve the present supply. As the price goes up, less of the commodity is purchased; a rib in price encourages users to economize. Similarly, a lowering of price encourages users to buy more, thus helping to sell the surplus which is developing.
[单项选择]He had a bad cold. （） is why he didn’t come.
A. It B. This C. That D. What [单项选择]He has lived ______ for many years. That’s why he can hardly speak his mother tongue now
A. in abroad B. exotic C. foreign D. abroad [单项选择]Why was he late
A. Laziness. B. Missed the bus. C. Car trouble. D. Heavy traffic. [单项选择]Why did you ask him for help instead of Jim He is （ ） helpful than Jim.
A. no more B. any more C. not more D. some more [单项选择]I didn’t understand at first why he couldn’t pass the test, no matter（）hard he had tried.
A. when B. where C. what D. how [单项选择]I couldn’t understand why he pretended（）in the street.
A. Not to see me B. not see me C. to see me not D. to see not me [填空题]I don’t know why he is so absorbed in collecting stamps, _________________. (你不妨当面问问他好了).
[单项选择]Why did the man ask the woman the wayA. Because he wanted to arrive at Turner’s Street on time.B. Because he didn’t know where the bus stop was.C. Because he didn’t know how to get to Turner’s Street.
[单项选择]—Do you see why he hasn’t turned up yet
—Sorry, I don’t know. A. what the matter is B. how matters stood C. what is the matter D. how is the matter 我来回答: 提交
|
