影响红细胞内外水分正常分布的因素主要是（ ）
A．血浆胶体渗透压
B．血浆晶体渗透压
C．组织液胶体渗透压
D．组织液静水压
E．毛细血管血压
参考答案：B
(a) IAS 8 Accounting Policies, Changes in Accounting Estimates and Errors contains guidance on the use of accounting policies and accounting estimates.Required:Explain the basis on which the management of an entity must select its accounting policies and distinguish, with an example, between changes in accounting policies and changes in accounting estimates. (5 marks)
吸痰机、床旁负压吸引器（）清洁擦拭1次。
A.每班次
B.每天
C.每2天
D.每3天
E.每周
