Most of sugar figurine in Song dynasty were in the form of steric.

Most of sugar figurine in Song dynasty were in the form of steric.（ ） A: 正确 B: 错误

Nefazodone is prone to be oxidized and metabolized to produce toxic metabolites. Which of the following strategies are used by scientists to optimize its structure and reduce liver toxicity A: F atom closes metabolic sites B: Benzene ring replaced with pyrimidine ring C: Increase metabolic site steric hindrance D: Introduce metabolizing sites to change metabolic pathways