临床上，引起肠梗阻的最常见原因是（）
A.机械性肠梗阻
B.动力性肠梗阻
C.血运性肠梗阻
D.粘连性肠梗阻
参考答案：A
某公司进口一批生羊皮，请根据所提供的单据，完成相关的判断题。
报检时须提供无木质包装声明。()
Eventually, the President had to leave office_____ public pressure in order to ease the tension of the situation.
A．in favor of
B．in response to
C．in return for
D．in honour of
