1. Most of which happened in mesiobuccal canal of maxillary molar and mesial canal of mandibular molar, accounting for 70. 7%. 器械折断于上磨牙近颊根管和下磨牙近中根管者居多，占70。7%。
2. With formaldehyde/phenol(molar ratio)1~1. 5∶1, resorcinol/phenol(molar ratio)0. 6∶1, a cold setting exterior RPF resin adhesive could be prepared. 当甲醛／苯酚摩尔比为1～1-5∶1、间苯二酚／苯酚摩尔比为0-6∶1时可制得室外级冷固型胶粘剂。
3. The results show that crystallization active zone of lanthanum carbonate is in low molar ratio zone, where the molar ratio is between 0. 541~2. 828. 结果表明：碳酸镧结晶活性区域位于低配比区0。541～2。828之间，而在高配比区其结晶是惰性的。
4. The first molar has the most serious tooth wear and the third molar was the lightest. 第一磨牙的磨耗程度最重，第三磨牙的磨耗程度最轻。
5. For solving the problem of molar heat capacity in linear quasi-static process, the formula of molar heat capacity in four kinds of particular process cant be used indiscriminately. 对于求解直线型准静态过程的摩尔热容量的问题，不能套用四种特殊过程的摩尔热容量公式，为此，特提出另一种可行的解法，并加以讨。
