"（） your meeting is!" he offered them his sincere congratulations． ["How a great success","What a great success","How great success","What great succe"]
某元件功率为正（P〉0），说明该元件（）功率，则该元件是（）。
社会主义法律关系
酸度计的参比电极一般用（）。 ["标准氢电极","饱和甘汞电极","银—氯化银电极","铂电极"]
短期融资券
什么是误差？
