This is ______ an interesting movie that

设i，j，k均为int型变量，则执行完for(i=0，j=10；i<=j；i++，j--)k=i+j；语句后，k的值为【 】。

巴西着重保护的自然资源是

A．热带雨林

B．热带草原

C．野生动物

D．亚马孙水源

按照承包商可能得到的要求和索赔结果划分，工程延误可以分为( )。

A．单一延误和共同延误
B．可索赔延误和不可索赔延误
C．单一延误和交叉延误
D．关键线路延误和非关键线路延误

QC小组三条宗旨中最关键的一条是建立文明的、心情舒畅的生产、服务、工作现场。

Both bus and tree topologies are characterized by the use of multipoint (1).For the bus, all stations attach, through appropriate hardware (2) known as a tap, directly to a linear transmission medium, or bus. Full-duplex operation between the station and the tap allows data to be transmitted onto the bus and received from the(3). A transmission from any station propagates the length of the medium in both directions and can be received by all other  (4). At each end of the bus is a (5) , which absorbs any signal, removing it from the bus.

空白（4）处应选择（）

A.routers

B.stations

C.servers

D.switches