有关慢性缩窄性心包炎的病理生理改变，下列哪项错误？（）
A. 心脏的舒张功能受损
B. 搏出量减小
C. 心肌收缩力减弱
D. 静脉血回流受阻
E. 左心后负荷增加
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蒋介石制造的“中山舰事件”和他提出的“整理党务案”是怎么回事？他的目地何在？
锅炉烟气中含氧量反映（），因此，测得烟气的含氧量，就可知道锅炉内的燃烧情况。
食品灰分是评价食品卫生和营养的重要参考指标。不可能导致食品灰分增加的是（）。
A. 生产工艺粗糙
B. 混入了泥沙
C. 加入了不合卫生标准的添加剂
D. 加入了大量的无机盐和微量元素
E. 添加了大量的蛋白质
Examine the following RMAN script: RMAN> run { debug on; allocate channel c1 type disk; backup datafile 5; } Which statement describes the purpose of the script?（）
A. The data file is checked for physical corruption and backed up if found clean.
B. The backup of data file 5 is performed and the interactive messages during the backup are suppressed.
C. The existing backup for the data file is checked and the backup is performed if there are changes in the data file after the last backup.
D. The backup of data file 5 is performed and all SQL statements that are executed during RMAN compilation and their results are displayed
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