【单选题】Pei was the son of a ____ banker.
【简答题】金属的实际结晶温度低于理论结晶温度的现象称为 。理论结晶温度与实际结晶温度之差称为 。 是金属结晶的必要条件。
【单选题】PEI的湿强机理是( )
A.
分子链中含有多个阳离子基,可与纤维上的羟基产生强的静电吸引,通过生成较强的离子间键合产生湿强效果。
【单选题】关于纯金属结晶的过冷度,下列说法错误的是?
【单选题】设c1. c2均是char类型变量,则以下不正确的函数调用为______。
【单选题】Miss Pei is on time for everything. How ______ it be ______ she was late for the opening ceremony?
【单选题】How did the criterion of “being hidden” in Yan style occur? A It dawned upon Yan Zhenqing accidently. B Yan Zhenqing learnt it from former masters. C Yan Zhenqing got the idea from Zhang Xu.
A.
It dawned upon Yan Zhenqing accidently.
B.
Yan Zhenqing learnt it from former masters.
C.
Yan Zhenqing got the idea from Zhang Xu.
D.
It was passed down from Yan’s ancestors.
【简答题】金属结晶的必要条件是______,理论结晶温度和实际结晶温度的差值称为______。
【简答题】金属结晶的必要条件是 ,及 金属的实际结晶结晶温度总 理论结晶温度。