治疗重症支气管哮喘的首选药物是（）
A.糖皮质激素
B.抗过敏类药物
C.茶碱类
D.钙拮抗剂
E.拟肾上腺素能药物
参考答案：A
Environment-friendly Olympics requires Beijing to improve its environment, turning it into an ecology-friendly city.
A．eventually
B．specially
C．absolutely
D．traditionally
