They'll also teach disaster _____ and first-aid to other employees and tourists.
A. preventing
B. prevention
C. prevents
D. preventions
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It's very ____ here, so do go out for some fresh air.
A. stuff
B. stuffs
C. stuffing
D. stuffy
It's hard for him to keep ______ since he had drunk so much.
A. perpendicular
B. perpendicula
C. perpendiculate
D. perpendiculars
The teams will be responsible for ______, first aid and ____ the alarm when fire or other emergencies strke.
A. evacuation, raise
B. evacuations, raising
C. evacuation, raises
D. evacuation, raising
事前和事后风险指标的区别在于( )。
A. 事前指标通常用来评价一个组合在历史上的表现的风险情况，而事后指标则通常用来衡量和预测目前组合在将来的表现和风险情况
B. 事后指标通常用来评价一个组合在历史上的表现的风险情况，而事前指标则通常用来衡量组合在将来的表现和风险情况
C. 事前指标比事后指标更准确
D. 事后指标比事前指标更准确
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