提出了立方根定律的经济学家是（）。 ["托宾","惠伦","汉森","鲍莫尔"]
墨子主张“兼爱”“非攻”，其思想代表（）。 ["新兴地主利益","富商利益","奴隶主利益","平民利益"]
Which three statements about classification marking of traffic at Layer 2 are true？ （） ["a Frame Relay header includes a 1-bit discard eligible （DE） bit to provide the class of service （CoS）","an ATM header includes a 1-bit DE field to provide the CoS","an MPLS EXP field is inserted in the Layer 3 IP precedence field to identify the CoS","the CoS field only exists inside Ethernet frames when 802.1Q or Inter-Switch Link （ISL） trunking is used","in the IEEE 802.1p standard， three bits are used to identify the user priority bits for the CoS","in the IEEE 802.1q standard， six bits are used to identify the user priority bits for the CoS"]
中华文明勃兴并为后世博大精深的中国文化奠基是在（）。 ["夏商西周时期","春秋战国时期","秦汉时期","魏晋南北朝时期"]
“脑卒中”英文简写正确的一项是（） ["CVA","VDA","ACV","BVC","VAC"]
（）、（）时期，皇陵的封土以山为陵
