下列关于会计估计及其变更的表述中，正确的是（）。A、会计估计应以最近可利用的信息或资

下列正确的是（　　）

A．（a²）³=a⁵

B．（xy²）²=xy⁴

C．x²•x²=2x⁴

D．a⁶÷a²=a⁴

单位撤销、合并或改变隶属关系、更换财产物资保管员时，需要进行全面清查（）。

Which of the following statements concerning Board committees is FALSE（）

A. The audit committee has authority over the procedures used to audit the entire corporate group including subsidiaries and affiliates.

B. The compensation committee should consist of independent members and link executive compensation to long-term performance.

C. Members of the audit committee should be independent experts in accounting and finance.

下图为某区域某时的近地面天气形势简图，读图完成下列各题。

1）说出使图中A区域和B区域产生降水的天气系统，并分析其产生降水的原因及降水的差异。

常染色体隐性遗传型多囊肾

A．成人型多囊肾
B．婴儿型多囊肾
C．髓质海绵肾
D．单纯性肾囊肿