甲型肝炎最有效的预防措施是（）
A.隔离患者
B.搞好“三管一灭”
C.注射甲肝疫苗
D.注射丙种球蛋白
E.流行期间服用板蓝根
参考答案：C
“太阳每天从东方升起”，这是一个（ ）事件（填“确定”或“不确定”）
In the statement of cash flows, a company is allowed to classify interest paid:()
A. in either the operating or financing section under IFRS.
B. in either the operating or financing section under U. S. GAAP.
C. only in the financing section under both IFRS and U. S. GAAP.
