如果从小军等10名大学生中任选1名作为“世博会”志愿者，那么小军被选中的概率是（

The job required ________did it ________careful and brave enough.[ ]

A. who; is        

B. whom; was          

C. whomever; were        

D. whoever; be

X元素原子的最外层电子数减去次外层电子数的结果等于电子层数；Y元素原子最外层比X元素原子最外层多2个电子。则X与Y可形成化合物（   ）

A．X₃Y₂

B．X₂Y

C．XY₂

D．XY₃

A little boy invited his mother to attend his school’s first teacher-parent meeting. To the little boy’s (1) , she said she would go. This (2) be the first time that his classmates and teacher (3) his mother and he felt (4) of her appearance. Although she was a beautiful woman, there was a severe sear (疤痕) that (5) nearly the entire right side of her face. The boy never wanted to (6) why or how she got the sear.At the meeting, the people were (7) by the kindness and natural beauty of his mother (8) the sear, but the little boy was still embarrassed (尴尬) and (9) himself from everyone. He did, however, get within (10) of a conversation between his mother and his teacher.The teacher asked (11) ," How did you get the scar on your face"The mother replied, " (12) my son was a baby, he was in a room that caught fire. Everyone was (13) afraid to go in because the fire was (14) , so I went in. As I was running toward his bed, I saw a long piece of wood coming down and I placed myself over him trying to protect him. I was knocked (15) but fortunately, a fireman came in and saved both of us. " She (16) the burned side of her face. "This scar will be (17) , but to this day, I have never (18) what I did. "At this moment, the little boy came out running toward his mother with tears in his eyes. He held her in his arms and felt a great (19) of the sacrifice (牺牲) that his mother had made for him. He held her hand (20) for the rest of the day.

第（9）空应选择（）

A．hid         

B．protected    

C．separated    

D．escaped

商品流通企业的管理信息系统是一个人机系统，体现在( )。

A．系统是由人开发的

B．系统是由人使用的

C．系统离不开人的参与与控制

D．系统是由人决策的

有关删除资金归集关系除的说法，错误的是：（）

A.删除资金归集关系，遵循由下至上的原则，先删除下级账户，然后再逐级向上删除。

B.归集关系删除的同时，收费合约不解除。

C.最高级账户资金归集关系删除包括删除自身和删除全树。删除自身，只能删除最高级账户自身归集关系；删除全树，解除整个归集树所有账户归集关系。

D.下级账户资金归集关系删除包括删除自身和删除子树。删除自身，必须从最低级别账户起逐级向上删除，被删除账户不能挂有下级账户，日终生效；子树删除时，被删除的子树在日终时解除所有账户之间的归集关系，只有子树删除生效后，才能对子树删除的上级账户进行删除。