胞核圆形，居中，染色质块状。核仁消失，胞质多色性（）
A.中幼红细胞
B.原始红细胞
C.浆细胞
D.原始单核细胞
E.早幼粒细胞
参考答案：A
When I handed the report to Peter, he said that David was the right person _____. [ ]
A. to send it to
B. to send
C. to be sent
D. for sending
川贝母的药理作用有（）
A.镇咳
B.祛痰
C.降血压
D.松弛肠肌
E.兴奋子宫
