属于肾上腺素受体激动药的平喘药物是()
A.沙美特罗
B.胆茶碱
C.酮替芬
D.布地缩松
E.曲安西龙
参考答案:A
________ there a post office and some supermarkets near here?[ ]
A. Have
B. Do
C. Are
D. Is
元朝时,黄道婆向黎族人民学会了棉纺织技术。( )