the third paragraph is developed mainly by___.

the third paragraph is developed mainly by___.
the third paragraph is developed mainly by___.

the third paragraph is developed mainly by___.
第三段主要以什么方式展开.
the third paragraph is developed mainly by time/space...（ 根据选项和内容来确定）.
展开方式有8种：
by time
by space
by process
by examples
by cause and effect
by comparison and contrast
by classification
by definition

第三段主要是通过___展开的。