行内元素&块级元素

块级元素：
address
figure
figcaption
ol
ul
article
output
aside
footer
audio
video
form
section
h1-h6
hgroup
canvas
header
table
div
hr
dl
dd
noscript
fieldset

行内元素：
b, big, i, small, tt
abbr, acronym, cite, code, dfn, em, kbd, strong, samp, var
a, bdo, br, img, map, object, q, script, span, sub, sup
button, input, label, select, textarea