英语
［113—117］
A.An organ of higher plants， usually subterranean and having several functions，including the absorption and conduction of water and dissolved minerals， food storage，and anchorage of the plant in the soil. It is distinguished from the stem by its structure，by the manner in which it is formed， and by the lack of such appendages as buds and leaves.
B.It grow horizontally， as a food-storing organ， beneath the surface of the ground， and enables a plant to reproduce itself.It has nodes， buds，and tiny leaves and does not die when cut； replanted， it yields new plant.
C.both A and B
D.neither A nor B
113.一种起运输作用的器官是
114.一种起机械支持作用的器官是
115.一种起贮存作用的器官是
116.通常位于地下的植物器官是
117.具有叶和芽者是
［118一120」
A.medullary ray
B.secretory structure
C.both A and B
D.neither A nor B
118.具分泌作用的结构是
119.具横向运输作用的结构是
120.具支持作用的结构是
