膳食纤维不能提供能量，也不构成机体组织，更要影响矿物质吸收，所以对人体而言，弊多于利。
参考答案：错
下列不属于生命现象的是（ ）
A．蜜蜂采蜜
B．钢铁生锈
C．杨柳飞絮
D．衣物发霉
At the railway station, the mother waved goodbye to her daughter until the train was . [ ]
A. out of sight
B. out of reach
C. out of order
D. out of place
