A stream of voice packets transmitted over a WAN network encounters differing queuing delays. One router in the path used by the voice packets delays some of the packets for 4 ms while transmitting a large video file， but delays other packets only 2 ms. Another router delays some packets 5 ms， but transmits others in 2 ms. How would you best describe this type of problem？（） ["end-to-end delay","interference from bulk data traffic","processing delays","serialization delays","jitter"]
下列情况在1938年的苏联不可能出现的是（） ["苏联的工业产量居欧洲第一，世界第二","政府统一制订国民经济发展计划，并逐级下达计划指标","苏联某拖拉机厂了解到中国需要大量的拖拉机，就派人去和中国商务部签订了购销合同，并利用中国急于得到拖拉机的心理大大提高了价格","苏联绝大部分农户加入了集体农庄"]
assuming the default switch configuration which vlan range can be added modified and removed on a cisco switch?（） [" 2 through 1001"," 1 through 1001"," 1 through 1002"," 2 through 1005"]
新文化运动中，陈独秀提出“德先生”和“赛先生”的口号的进步意义体现在（）。 ①反对封建专制统治 ②反对愚昧，促进科学事业的发展 ③促进了中国的富强 ④促进了中国对社会主义思潮的研究 ["①②③④","①②④","①②③","①②"]
麦金农认为货币与实质资本之间的渠道效应发挥作用的一个前提条件是：货币的实际收益率要低于实质资本的收益率。（）
述而不作
