※ 引述《sakishil (亚凯)》之铭言：
: http://i.imgur.com/jNLRgSD.jpg
: 这题题目用这样解
: http://i.imgur.com/aSh1pNp.jpg
: 我想请问只能用FLT解吗（
MLT也一样能解阿
[△h] = [D] = L
[γ] = M / (L^2 T^2)
[σ] = M / T^2
用D和γ
[(△h)]^a [D]^b [γ]^c
L^a L^b M^c / [L^(2c) T^(2c)] = 1
a + b - 2c = 0
c = 0
=> a = -b
取△h/D
[D]^a [γ]^b [σ]^c
= L^(a - 2b) M^(b + c) T^(-2b - 2c) = 1
=> a - 2b = 0
b + c = 0
=> a = 2b
c = -b
取(D^2 γ / σ)^(-1)
=> (△h / D) = f(σ / (γ D^2))
一样得到跟解答相同的结果