英语3级b

大学英语三级B级每日一练【题目描述】What do we know about the Operation Center in the relief efforts of the Indian Ocean Tsunami？A．It was available all the time.B．It served as a supply warehouse.C．It set its head office in Copenhagan.D．It worked as the UNICEF's head office.【我提交的答案】： C【参考答案与解析】：正确答案：A答案分析：【我的疑问】为什么选A