Work went ahead without __________. A: hindrance B: hillside C: hinge D: hoist

Workers maintain that the company’s （） to implement modern safety regulations puts everyone in the factory at risk of injury. A: discouragement B: indecision C: unwillingness D: hindrance

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

Which of the following is NOT mentioned as one of the trade obstacles in the text A: Resistance from a large number of big enterprises against foreign competition. B: Hindrance of business and government to imported goods that threaten domestic markets. C: Firm support for import restrictions among Japanese workers, one of the powerful political forces. D: Historically formed bureaucracy which makes laws and regulations and enforces them.