血小板第3因子活性主要是下列哪种物质由膜内侧转向膜外侧所形成的()
A.磷脂酰乙醇胺
B.磷脂酰胆碱
C.磷脂酰肌醇
D.磷脂酰丝氨酸
E.甘油磷脂
参考答案:D
of the students in our class money for the disabled people these days.
A.Half; has raised
B.Two thirds; has raised
C.Three fourth ; have raised
D.Three fifths; have raised
强调组织结构设计中,职位的职权和职责相一致的原理是()
A.目标统一原理
B.责权一致原理
C.管理宽度原理
D.分权协作原理