学习障碍是由中枢神经系统的个别差异引起的，是（）失调的表现。

阅读理解。

　　The world is divided (分为)into two main parts . The difference is that

one part is rich  and the other is poor . In the poor part , a lot of people never get

enough to eat . In the  rich part , a lot of people eat too much . In one part , child

starve (饿死)and in the other ,  a lot of people get fatter and fatter and have to

go on diets (吃特别饮食), or do special  exercises in order to lose weigt.     

　　The poorer countries have special problems . Sometimes the land is too

poor to grow  anything on . The land can be improved (改善), but a lot of

things must be done first . The  people must be educated an water must be

found.     

　　But rich countries have problems , too . There are not always pleasant

places to live in .  Sometimes the air is too dirty to breathe , and the rivers are

too dirty to swim in or to take  water from . The roads are too crowded to drive

along . Large numbers of people do not have  decent (象样的)housed to live

in . Some things will have to be done about these problems .  The air and the

river will have to be cleaned , and more houses will have to be built.     

Answer the questions :   

1. What’s the difference between the two parts ?     

___________________________  

2. Do the poorer countries have many problems ? What for example ?     

___________________________  

3. Can anything be done about it ?     

___________________________  

4. What must be done, for example ?     

___________________________  

5. Can all this be done easily ?     

___________________________

一列简谐横波以1m/s的速度沿绳子由A向B传播，A、B间的距离为3m，如图甲所示。若质点B的振动图象如图乙所示，则质点A的振动图象为丙图中的（   ）

电子渠道服务“三农”要坚持以（）为重点

A、确保农业银行“三农”电子渠道运营顺畅

B、惠农卡电子渠道受理环境建设

C、提供电子金融交易和综合信息服务

D、确保农业银行“三农”电子银行业务风险可控

患者男，30岁。乏力，腹胀，食欲不振，脾大平脐、无腹腔积液。为确诊应做以下哪项检查（）

A.血象

B.骨髓象

C.肝功能

D.全身骨骼X线

E.B超和消化道钡透

下面用到UIMC的机框有（）

A.BUSN

B.BCTC

C.BPSN

D.BCSN