题目

A singing contest of Chinese songs for overseas Chinese 【1】 (hold) on June 15th, 2019 in Houston, the fourth largest city in the United States. The contest is part of the “Water Cube Cup” Chinese Songs Singing Competition, which is 【2】 global activity to introduce Chinese culture and tell Chinese stories to the world. 【3】 (it) aim is to strengthen the link between China and the world through Chinese culture. In August, the top three will go to Bejing for the final.下列与免疫失调无关的疾病是 A．过敏性鼻炎      B．血友病        C．艾滋病      D．系统性红斑狼疮