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问题 多项选择题

【GPRS】在GPRS中有如下的MAC（Medium Access Control，媒体接入控制）模式：（）

A、固定分配

B、扩展固定分配

C、动态分配

D、扩展动态分配

答案

参考答案：A, C, D

完形填空

Bruce's chocolate

Bruce's favorite food is chocolate.His parent and teacher ofen say that it's ___1___ for his teeth to eat too much chocolate.But he doesn't belive it.He often puts some chocolate in the milk for breakfast, the juice___2__ lunch ,even the soup for supper. His mother has to ___3__ some chocolate in his bag before he goes to school.Sometimes when his mother goes shopping with him,Bruce won't leave the shop ___4__  she buys some chocolate for him.

The little boy  ___5__  back from school with a painful(痛苦的) look yesterday afternoon. A tooth hurt and he had nothing .His mother made some soup for him.But he put some chocolate in it.His father bought some __6__for him,but he put some chocolate in it, __7__ .Of course it was useless(无用) .So the next morning his mother took him to see the __8__ .The dentidt saw there was a cavity(洞) in his bad tooth .So he had to fill（填充） it with something.

“Now,young man,” said the dentist , “what kind of filling（填充物） would you like for that tooth ?”

“__9__,please,”answered Bruce.The dentist and Bruce’s mother were both laughed(大笑).The dentist asked Bruce to eat fresh fruit and vegetable__10__ chocolate. And It’s necessary for Bruce to have healthy eating habits.

小题1:     

A．good

B． bad

C． well

D． better小题2:     

A．for

B． to

C． at

D． with小题3:     

A．throw

B． put

C． buy

D． get小题4:     

A．when

B． until

C． if

D． because小题5:     

A．come

B． go

C． return

D． came小题6:     

A．medicines

B． pill

C． medicine

D． a pill小题7:     

A．also

B． too

C． either

D． as well小题8:     

A．doctor

B． nurse

C． teacher

D． dentist小题9:     

A．Chocolate

B． Milk

C． Fruit

D． Vegetabls小题10:   

A．instead

B． but

C． instead of

D． no
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多项选择题

影响问题解决的主要原因包括（）。

A.迁移作用

B.原型启发作用

C.定势作用

D.动机作用
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