按照( )可将基金分为公司型投资基金和契约投资基金。
A.基金单位是否可增加或赎回
B.投资对象的不同
C.资本来源和运用地域不同
D.组织形态的不同
参考答案:D
He went to school by car this morning.
A.drive a car to school
B.went to school in a car
C.took a bus to school
D.by car to school
门静脉高压症的主要病因是()。
A.门静脉血栓形成
B.门静脉主干畸形
C.肿瘤压迫门静脉
D.门静脉炎症
E.肝硬化