Uncross linked condensed polynuclear aromatics ( COPNA ) resins ( B resins ) were prepared at 150 ℃~ 160 ℃ in the presence of an acid catalyst such as p toluene sulfonic acid sulfuric acid or chlorosulfonic acid .

以萘为单体、 三聚 甲醛为交联 剂，可在 对甲苯磺酸、浓硫酸或氯磺酸的催化下，在150～160℃下反应得到未交联的缩合多核芳香烃树脂（B－树脂）。

In both experiments under no visual field advantage condition the patients don 't show any significant difference between cross and uncross hand-field combinations .

实验一和二中，病人在没有优势半球的条件下，刺激呈现视野的同侧和 对侧反应用手之间没有显著差异。