油脂是油与脂肪的总称，它是多种高级脂肪酸甘油酯的统称。油脂既是重要食物，又是重要的化工原料。油脂的下列性质和用途与其含有不饱和双键有关的是

A．适量摄入油脂，有助于人体吸收多种脂溶性维生素和胡萝卜素

B．利用油脂在碱性条件下的水解，可以生产甘油和肥皂

C．植物油可以通过氢化制造植物奶油（人造奶油）

D．脂肪是有机体的组织中储存能量的重要物质

The estimate at completion (EAC) is the projected or anticipated total final value for a schedule activity, WBS component, or project when the defined work of the project is completed. To determine the EAC, assuming no management intervention, which of the following information is needed

A) The earned value(EV)and the actual cost to date(AC) .
B) The cost performance index(CPI)and the cost variance(CV).
C) The actual cost to date(AC) and the cost performance index(CPI).
D) The actual cost to date(AC) and the estimate to complete(ETC) .