在事务处理中被称为机关总事务工作的是（）。A、会议管理 B、信访工作 C、后勤事务

不同长度的物体在同一时刻同一地点的太阳光下得到的投影是[ ]

A.相等          

B.长的较长        

C.短的较长        

D.不能确定

实验室有失去标签的稀盐酸和氢氧化钠两瓶液体，某同学计划使用下列试剂进行区分，你认为其中不可行的是（　　）

A．锌粒

B．石蕊试液

C．酚酞试液

D．澄清石灰水

In low-speed network，it is usually adequate to wait for congestion to occur and then react to it bytelling the source of packets to slow down．In high-speed networks，this approach often works poorly，because in the (71) between sending the notification and notification arriving at the source，thousands of additional (72) may arrive．In ATM network，a major tool for preventing (73) is (74) control．When a host wants a new virtual (75) ，it must describe the traffic to be offeredand the service expected．

（72）处填（）。

A．packets

B．cells

C．message

D．files

转向架固定轴距

银行出借货币时也出让了对借出货币的所有权。( )