自驱力
参考答案：源自营销人员内在想用自己的方法设法完成销售的心里因素。
He _____ football regularly for many years when he was young.
A．played
B．was playing
C．has played
D．had played
属于脂肪组织中合成三酰甘油的原料是
A．甘油B．3-磷酸甘油C．1-磷酸甘油醛D．1，3-二磷酸甘油酸E．2，3-二磷酸甘油酸
