ED途径是细菌把葡萄糖生转化成（）与（）。
参考答案：丙酮酸;3-磷酸甘油醛
President Bush was in Omaha this morning to deliver a speech, but he the city by the time the shooting took place．
A．left
B．had left
C．had been leaving
D．would have left
一个数越大，它的因数就越多．______．
