if true...weakens题:题目一般结构为if A true, B is weakened.(其中A是待选的,B是文中的assumption X)
三个要素,XYZ。比如:因为X,所以若Y则一定Z。反驳X:Y成立而Z不成立。要搞清楚XYZ各自确切含义。这是比较复杂的逻辑题可能出现的情况,一般的没这么复杂,重要的是自己理清其中有什么逻辑空隙。我觉得最常出现的就是亚决定性吧(或者说叫他因),就是AB都可能导致C,而文章只说A导致C。
有时候转折不由明显转折词提示,而体现在主语变换(两个对立主语)
e.g.
In American Indian art, the supposed distinction between modern and traditional was fabricated by critics, and when artists have control over interpretation of their own work, the distinction appear, happily, to have been __AC___.
A. eliminated B. reinforced C. put to rest D. intensified E. recognized F. established
再来个判结构的例子。
e.g.
The research on otters’ environmental requirements is surprisingly (i)__difficult___. One reason for this has to do with the estimation of how much they use different areas. Doing so may be (ii)__relatively simple___ in some kinds of terrain, such as Shetland where the Eurasian otters are active in daytime and have clear individual markings. There it is possible to identify the individuals over stretches of coast of a few kilometers and to see what kinds of coast they use. However, the field conditions are (iii)__exceptional___.