Your Service Provider does not support Link Fragmentation and Interleave, but upstream serialization delay on your broadband link is affecting voice quality. Which two mitigation strategies are viable?（） ["Upgrade your residential broadband service to at least 768kbps uplink.","Switch your home router to use PPP encapsulation.","Use the ip tcp adjust-mss interface command.","Employ QoS techniques to drop large data packets.","Use traffic shaping to interrupt large data packets."]
发票的存放和保管应按税务机关的规定办理，不得丢失和擅自损毁。已经开具的发票存根联和发票登记簿，应当保存（）。 ["1年","3年","5年","10年"]
In the OSNR model for EDFA amplifiers, SNR OUT = 1/(1/SNR IN + FhvB/P IN ), what does SNR IN represent?（） [" the signal to noise of the current optical amplifier"," the signal to noise of the previous amplifier or source"," the signal to noise introduced by the optical multiplexer"," the accumulated noise to signal ratio of the optical channel"]
执行下面程序段后 结果K=（） X =（）
2007年8月31日，胡锦涛总书记在全国优秀教师代表座谈会上作了重要讲话，提出了坚持育人为本、德育为先，把（）作为教育根本任务的新指示。
农民题材小说更多表现了鲁迅“（）”的思想。
