最常见的脂肪肉瘤为（）
A.分化良好型脂肪肉瘤
B.去分化脂肪肉瘤
C.黏液样脂肪肉瘤
D.多形性脂肪肉瘤
E.混合型脂肪肉瘤
参考答案：A
Mary is sure to come for dinner if she ________ time this evening. [ ]
A. has
B. will have
C. had
D. is having
某电子产品厂商每年采购电热圈50000箱，每批量订货费用4000元，经测算储存费用占每箱电热圈价款的20%，采购批量区间与价格见表4-3。求经济订货批量及总库存成本。
