dfrac (1)(6)-|||-C. dfrac (1)(2) D. dfrac (1)(3)
-dfrac (2)(3) C. dfrac (2)(3) D. dfrac (1)(9)
dfrac (1)(x) C. -dfrac (1)({x)^2} D. dfrac (2)({x)^3}
_(1)-(F)_(2)-|||-C. dfrac (2)(3)(F)_(1)+dfrac (1)(3)(F)_(2)-|||-D. dfrac (2)(3)(
B. dfrac {1)(2) . C. dfrac (2)(3) . D. dfrac (3)(4)
大于等于dfrac (1)(2)B. 小于等于dfrac (1)(2)C. 小于等于dfrac (1)(2)D. 大于等于dfrac (1)(2)调整某种仪器1
-1-|||-C. dfrac (1)(2)-|||-D. -2
dfrac (3)(2) D. dfrac (1)(2)
dfrac (1)(2)-|||-C dfrac (1)(6)-|||-D . dfrac (1)(36)
dfrac (1)(435)-|||-C. dfrac (28)(435)-|||-D. dfrac (56)(435)