21. Managers should "milk" cash cows for as much as they can, limit any new investment in them, and use the large amounts of cash generated to invest in ________ and ________.
(A) dogs； stars
(B) question marks； dogs
(C) stars； question marks
(D) cash cows； dogs

答案：登入後查看
統計： A(0), B(0), C(3), D(0), E(0) #2586597