专转本考试英语到底有没有听力啊？，有经验的回答...

设函数z=x2ey，则全微分dz=_______．

学生年龄特征包括哪两方面特征（ ）

A.认识和情感特征
B.认识和个性特征
C.个性和性格特征
D.生理和心理特征

某小学创造了“希望树”，让孩子把自己进步的希望以“果子”的形式贴到“希望树”上，一旦目标达到了，“果子”就成熟了，可以自己去摘下来，再策划下一个“希望”。这种德育方法属于（ ）

A.榜样示范法
B.实际锻炼法
C.指导自我教育法
D.品德评价法

If you want to stay young,sit down and have a good think．This is the research result of professor Faulkner,who says that most of our brains are not getting enough exercise and as a result,we are ageing unnecessarily soon.
Professor Faulkner wanted to find out why healthy farmers in northern Japan appeared to be losing their ability to think and to reason at a relatively early age,and how the process of ageing could be slowed down.
He set about measuring brain volumes of a thousand people of different ages and occupations．
Computer technology enabled him to obtain precise measurements of the volume of the front and side sections of the brain,which relate to intelligence and emotion,and determine the human character．
Contraction of front and side parts--as cells die off--was observed in some subjects in their thirties,but it was still not evident in some sixty-and seventy-year-olds.
Faulkner concluded from his tests that there is a simple way to slow the contraction—using the head.
The findings show that contraction of the brain begins sooner in people in the country than in the towns．Those least at risk,says Faulkner,are lawyers,followed by university professors and doctors．White--collar workers doing routine work are,however,as likely to have shrinking brains as the farm worker,bus driver and shop assistant.
Faulkner's findings show that thinking can prevent the brain from shrinking．Blood must circulate properly in the head to supply the fresh oxygen the brain cells need．"The best way to maintain good blood circulation is through using the brain,"he says．"Think hard and engage in conversation．Don't rely on pocket calculators."

According to the passage,which group of people seem to age slower than the others?

A.Farmer
B.Lawyer
C.Clerk
D.Shop assistant