判断题 从世界各国发展规律的角度来看，第三产业人力资源的比重一直呈上升趋势。()

判断题 'Letter of credit' is often shortened as L/C or L.C. and is sometimes referred to as 'banker's commercial letter of credit', 'banker's credit', 'commercial credit' or simply 'credit'.()

判断题 here are two types of business negotiations、formal and informal.()