会计对象各个要素之间的平衡关系可以用公式表示为：收入-费用=利润， 它通常被称为会计恒等式。( )
参考答案：错
— You speak very good French!
— Thanks. I _____ French in Sichuan University for four years. [ ]
A. studied
B. study
C. was studying
D. had studied
下列不属全身性水肿病因的是（）
A.尿毒症
B.肝硬化
C.低蛋白血症
D.丝虫病
E.右心衰竭
