不会产生单点故障的、总线型、环型、网状结构 总线型拓扑结构会受到网络中信号反射的影响
impact,influence,effect,用法意义区别是什么
effect n.结果, 效果, 作用, 影响, (在视听方面给人流下的)印象 vt.招致, 实现, 达到(目的等) impact n.碰撞, 冲击, 冲突, 影响, 效果 vt.挤入, 撞击, 压紧, 对…发生影响 affect vt.影响, 感动, 侵袭, 假装 influence n.影响, 感化, 势力, 有影响的人(或事), (电磁)感应 vt.影响, 改变 What is the difference between affect and effect? Answer: Affect is a verb that means to have an influence on or to bring about a change in: Does second hand smoke affect the health of all of us? Effect can also function as a verb meaning to execute: Only the president can effect such a change. However, effect is most often used as a noun meaning, result: The drug did not affect the disease, and it had several adverse side effects. Rule of thumb: if you need a verb, nine times out of ten you will used affect; if you need a noun, you will always use effect. 问题102：affect和effect有什么区别？ 回答：affect是一个动词，意思是“对……有影响”或“给……带来变化”。 例如：Does second hand smoke affect the health of all of us? effect有时也可以作动词用，意为“执行”。 例如：Only the president can effect such a change. 但是，effect在大多数情况下都被用作名词，意为“结果”。 例如：The drug did not affect the disease, and it had several adverse side effects. 一个简便的原则就是如果你需要一个动词的话，十之八九选用affect，如果需要一个名词，则通常使用effect. affect vt.①影响②打动，感动③(疾病)侵袭 词汇辨析affect,effect,influence： affect常用作动词，effect常用作名词(意为“影响”)：to affect sth.=to have an effect on sth. effect 作动词时很正式，意为“产生，带来(结果)”，这个产生或带来的结果常常是某人所希望的。 influence指通过行动、榜样等对他人产生潜移默化的影响或作用，注重“影响”的结果。 记忆方法形似词：effect n.影响；effort n.努力 词根记忆af(使)+fect（做）→使人做→影响 effect 43 n.①结果②效果，作用vt.产生，招致 经典例句The effect speaks, the tongue needs not.事实胜于雄辩。 考点提要in effect = in fact 实际上；take effect = come into force 实施，生效；to that effect 大意如此 记忆方法fect(作用)→affect v.影响；effect n.影响 词根记忆ef(出)+fect（做）→做出来→生效，效果
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