既能消食健胃，又能涩精止遗，还可治疗小儿脾虚疳积的药物是（）
A.银柴胡
B.麦芽
C.乌梅
D.莱菔子
E.鸡内金
参考答案：E
论述植物地上部分与地下部分生长的相关性，并写出两种生产中控制根冠比的方法及其原理。
The following data pertains to a company’s common-sized financial statements. Current assets 40% Total debt 40% Net income 16% Total assets $ 2000 Sales $1500 Total asset turnover ratio0.75 The firm has no preferred stock in its capital structure. The company’ s after-tax return on common equity is :（）
A. 15%.
B. 16%.
C. 20%.
