n﹣1=1,且m﹣3≠0,m2﹣8=1,
解得n=2,m=﹣3.
下列说法正确的是( )
—What can I do for you, sir?
—I'd like to see the manager of sales department.
如图是某简单组合体的三视图,则该组合体的体积为( )
古诗句“草盛豆苗稀”说明生物之间存在( )