题干
Yao Ming has retired from the NBA, the pleasure we have got by watching him play basketball at home and abroad will last long．
A：Although
B：If
C：'Since
D：Once
答案(点此获取答案解析）
A
为“智力之花”，人体中缺少或含量过多都会导致甲状腺疾病，这种元素是