下列哪种疾病可闻及全舒张期杂音（）
A.主动脉瓣关闭不全
B.主动脉瓣狭窄
C.二尖瓣关闭不全
D.二尖瓣狭窄
E.三尖瓣关闭不全
参考答案：A
Americans have something _______ Thanksgiving, a festival which celebrates the first harvest of the settlers who _____ from Europe to the USA.
A. calling ; goes B. calls ; going C. which called; gone D. called ; went
铁蛋白和含铁血黄素储存于（）.
A.中性粒细胞
B.淋巴细胞
C.网状细胞
D.胃壁主细胞
E.肝脾骨髓的单核巨噬细胞
