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