题目内容

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

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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

E00FIMKA LINKCZ()M POTINFGLK

A. 1
B. 2
C. 3
D. 4

已知斜面的倾角为θ,若要保持A静止,则物块与斜面间的摩擦系数/应满足的条件为( )。

A. ( tanθ≤f
B. ( tanθ≥f
C. ( cotθ≤f
D. ( 无限制条件

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