分析企业能力的主要标准是( )。
A.生产能力
B.生产效率
C.效率
D.生产要素
E.效果
参考答案:C,E
下列物质中属于电解质的是( )
①氢氧化钠 ②硫酸钡 ③铜 ④蔗糖 ⑤二氧化硫 ⑥盐酸.
A.①②
B.①②⑥
C.③④
D.①⑤
English schoolboys often show the sense of sportsmanship to a______high degree in their relations with each other.
A.precisely
B.surprisingly
C.clearly
D.essentially