加氢裂化是强放热反应,据研究:裂化床层温度超过正常12-13℃,反应速度提高();如果温度超出25℃反应速度提高()
A.1倍
B.2倍
C.4倍
参考答案:A, C
The survey shows that speed___ at least 30% percent of road traffic deaths.
A.results in
B.results from
C.lies in
D.suffers from
格里菲思准则的基本思想及假定,修正的准则主要考虑何种因素进行修正?