在假设检验问题中,显著性水平口的意义是( )。
A. ( 在原假设H0成立的条件下,经检验H0被拒绝的概率
B. ( 在原假设H0成立的条件下,经检验H0被接受的概率
C. ( 在原假设H0不成立的条件下,经检验H0被拒绝的概率
D. ( 在原假设H0不成立的条件下,经检验H0被接受的概率
提高产品价值的最有效途径是()。
A. 大幅度提高功能,小幅度提高成本
B. 功能保持不变,提高成本
C. 提高功能的同时降低成本
D. 稍微降低功能,大幅度降低成本
When Midori was two years old, she was not allowed to touch her mother's violin because____________.
A. she was too young to play the violin
B. the violin was too expensive
C. the violin was too big for her
D. her mother wanted her to play the piano
在下列溶液中,BaSO4的溶解度最大者是( )。
A. ( 0.1mol/1H2SO4
B. ( 0.2mol/1Na2SO4
C. ( 0.3mol/1BaCl2
D. ( 纯水