松弛说
时间知觉
下面陈述中，不属于供给学派政策主张的有（）。 ["减税政策存在着时滞效应，其有利于储蓄和投资的反应在短时间内不可能非常显著，需要耐心的等待","控制通货膨胀需要从供给和需求两个方面同时人手","高税率是导致美国陷入“滞胀”泥潭的重要因素","“单一规则”是进行货币限制的有效手段"]
In which circumstance are multiple copies of the same unicast frame likely to be transmitted in a switched LAN?（） [" after broken links are re-established"," in an improperly implemented redundant topology"," when upper-layer protocols require high reliability"," during high traffic periods"," when a dual ring topology is in use"]
简述学前儿童呼吸系统的卫生保健措施。
空军战斗的基本原则是？
