Features of block-level elements and inline elements

Block-level elements:
	Div P (paragraph label) UL Li ol DL DT DD table H1-h6 section NAV title Footer etc.
	Features: Exclusive line--document flow
	Layout: Display:block
	And will be affected by the width and height of the margin (padding/margin)
	If the current document flow is centered: margin:0 auto; must have width
In-line elements
	Span a img input i em label B meta strong Code font Select SUP Sub
	Features: Drift, not exclusive line
	Unaffected by width and height, but also by Margin-top/bottom
	Layout: Display:inline

Features of block-level elements and inline elements