题目

两支试管中分装有等量的荧光素，开始都发光，过了一段时间都不再发光。有人在两支试管中分别加入甲、乙两种物质，结果加入乙物质的试管又发光了。则乙物质可能是     A.淀粉          B.麦芽糖        C.葡萄糖        D.ATP 答案：D Look at the trouble I am in. If only I _____ your advice. A. followed　  B. would follow     C. had followed　   D. should follow