对零件关系P，查询各种零件的平均单价、最高单价与最低单价之间差价的SQL语句为：SE

Would you please keep silent? The weather report ________  and I want to listen to it.

A．is broadcast

B．has been broadcast

C．is being broadcast

D．had been broadcast

Last week I met my old friend Li Ming but I forgot ___ him for his telephone number.[ ]

A. ask                    

B. asking    

C. and ask                

D. to ask

施工单位自施工起重机械和整体提升脚手架、模板等自升式架设设施验收合格之日起（）天之内，应向建设行政主管部门或者其他有关部门登记。

A．10

B．15

C．20

D．30

镜板是发电机中尺寸精度和表面光洁度要求最高的部件

病案管理人员的职责包括（）。

A.保管与提供病案信息服务

B.收集与整理

C.统计

D.加工与分类

E.以上均是