异长调节是指心脏的每搏输出量取决于（）。
A.平均动脉压
B.心率贮备
C.心力贮备
D.心室舒张末期容积
E.心室收缩末期容积
参考答案：D
Briefly describe the five elements of an effective enterprise internal control in accordance with the “Basic Standard for Enterprise Internal Control”《企业内部控制基本规范》.Based on the information provided in Materials 4 (资料四 ) in relation to Sobright Company, identify the major risks that the Company exposes to in its fund management activities.
成熟乳为产后几日后分泌的乳汁（）。
A.7天
B.10天
C.14天
D.16天
E.20天
