((y+dfrac {1)(2))}^2=dfrac (3)(4) D. ((y-dfrac {1)(2))}^2=dfrac (3)(4)
B. dfrac {1)(2) . C. dfrac (2)(3) . D. dfrac (3)(4)
(D) (hat {mu )}_(4)=dfrac (1)(3)(X)_(1)+dfrac (3)(4)(X)_(2)-dfrac (1)(12)(X)_(3)
dfrac ({q)^(b^3)(6ELa) C. dfrac ({q)^(t^4)(8{F)_(a)} D. dfrac ({q)^3}(6EL) :
-dfrac (2)(3) C. dfrac (2)(3) D. dfrac (1)(9)
dfrac (3)(2) D. dfrac (1)(2)
dfrac (3)(2)RC dfrac (7)(2)R D. dfrac (3)(2)RT对于双原子气体的摩尔定压热容的表达式为()
dfrac (pi )(4) C. dfrac (pi )(2) D.π
lim _(xarrow 4)dfrac (sqrt {1+2x)-3}(x-4)= (-|||-A dfrac (2)(3) .-|||-B 2-|||-C
dfrac (3)(7) C. dfrac (3)(4) D dfrac (3)(5)-|||-所选酱率:A-|||-课由陈述