（一） a1 v a2 = contrat “对照”即是一个事物的两方面做比较，如看电视的利弊，出国留学等等，a1好，a2坏；或是a1坏，a2好 （二）a v b = compare 对比 即是两个事物做比较，如锻炼是跑步好还是做操好等，a b同好或是同不好
但是两种题型结构都是一样的，如下：
段一 摆擂台，展现“两”面
段二 回到a （a1）
单向分析 原因，或结果，重要性，做法
段三 回到b （a2）
段四 结尾 选择类 a or b
表态类（用死不表态法） a1 v a2
段一
1．when it come to the iue (phenomenon) of ……( tuition fee;tv effect), different people have radically different opinion. ome people hold onto the idea that ……. other people ,however, deem that…….
2. a regard the iue of……,there i a popular dicuion. ome people … other people ,however,……
段二
开头：…… becaue of the following factor.
接下来和单向类的段二相同
段三
开头 by comparion,
a or b
in the imilar way,
by contrat,
a1 v a2
quite on the contrary,
接下来和单向类段二相同
段四
表态类（死不表态法）
jut a any coin ha two ide, it’ no exception with the iue of …. actually the iue i jut like a double-edged word,and we hould try every mean to avoid it harmfulne while at the ame time, making the mot of it advantage.[由www.haoZuowen.Com整理]
选择类
a dicued above, each ide ha it advantage and diadvantage. if i’m allowed to make a deciion, i prefer a to b ( b to a) , for the following reaon. on one hand,….. on the other hand,……