葡萄糖（）

A.通过血管合体膜裂隙或通过细胞膜内陷吞噬

B.易化扩散

C.主动运输

D.滤过作用

E.简单扩散

The controlling depth of the river is（）.

A.the minimum depth of the river prescribed in the channel maintenance program

B.the edge of a dredged channel

C.the highest level to which the river may rise without flooding

D.the least available water in a channel which limits the draft of boats and tows