古巴比伦王国被北方入侵的民族所灭亡，是在[ ]
A．公元前18世纪
B．公元前17世纪
C．公元前1595年
D．公元前6世纪
答案：C
—Did your uncle tell you ________?
—Yes, he said he went there in 2008. [ ]
A. how he goes to Wuhan
B. why did he visit Kunming
C. when he traveled to Hong Kong
D. where did he spend his vacation
三角形接法的负载，只能应用在三相负载平衡条件下。（）
