《司马光奏议》载,“夫农、工、商贾者,财之所自来也。……公家之利,舍其细而取其大,散诸近而取诸远则商贾流通矣,农、工商贾皆乐其业而安其富,则公家何求而不获乎?在这里,司马光( )
A:坚持“重农抑商”政策
B:指出促进商业流通的重要性
C:提出“农本商末”观点
D:说明保持社会稳定的必要性
- Can you go swimming with us this afternoon?
- I'd love to, but I ____________ take care of my mother because she is ill.
(I)求证:MB∥平面PAD;
(II)求二面角P﹣BC﹣D的余弦值.