题目

Several days ago, a Beijing-based IT com­pany fired about 400 people overnight. No one had expected the job cuts, which broke with traditional ways of letting go of workers in Chi­na. Moreover, what was special about this case was that the day before the 400 were fired, they all received from their boss a gift—the book “Who Moved My Cheese?”The book—a bestseller in the US—is being used by men and women to deal with changes in their lives and work. Some large organizations, including Coca-Cola, Kodak and General Mo­tors, ask their employees to read it in order to encourage t已知△ABC∽△A′B′C′，且BC∶B′C′＝ AC∶A′C′，若AC＝3，A′C′＝1.8，则△A′B′C′与△ABC的相似比是(　　)A. 2∶3 B. 3∶2 C. 5∶3 D. 3∶5