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问题 填空题

直线y=9-3x与x轴交点的坐标是______，与y轴交点的坐标是______．

答案

当y=0时，x=3；当x=0时，y=9．

故直线y=9-3x与x轴交点的坐标是（3，0），与y轴交点的坐标是（0，9）．

单项选择题

创业如果能够抓住机遇，只需要克服一些诸如资源稀缺等困难就可以实现从无到有的飞跃，创业是一时的艰难；守业则是要守住这份基业，需要不断地适应新情况，作出新的对策，一次的失误都可能造成整个基业永久的消亡。因此：( )

A．创业并不艰难

B．人应当不断地创业，而不是坚守

C．创业是一时的艰难，而守业则是长期的艰难，守业需要付出更多的努力

D．有些组织是可以永久地存在下去的
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单项选择题

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).Atransmission from any station propagates the length of the medium in both directions and can be received by all other(4).At each end ofthe bus is a(5),which absorbs any signal, removing it from the bus．

空白（1）处应选择（）

A.medium

B.connection

C.token

D.resource
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