开放性试题是近几年高考新出现的题型 ,主要类型有三类 :条件开放 ,结论开放 ,条件与结论同时开放 .对于此类型题型在解答时 ,思维较灵活 .有时图 1　例 1图要从条件探求结论 ,而且结论又不唯一 ;有时又要从结论出发逆向探求条件 ,而且结论不唯一 ;有时又要根据题意自己去探求 The open questions are newly emerged in the college entrance examination in recent years. The main types are three types: conditions are open, conclusions are open, and conditions and conclusions are open at the same time. For this type of questions, the thinking is more flexible. Sometimes Figure 1 Example 1 Figure It is necessary to seek conclusions from the conditions, and the conclusions are not unique; sometimes it is necessary to reverse the search for conditions from the conclusions, and the conclusions are not unique;