5 設 ,令旋度(curl)∇ × F = αi + β j + γ k ,則α + β + γ 等於?
(A) 6
(B) 0
(C) −1/2 
(D)− 3

答案:登入後查看
統計: A(5), B(0), C(0), D(0), E(0) #1059300