( )是截面为矩形并稍带钝边的长条钢材，其在建筑上用作房架构件、扶梯、桥梁和栅栏等。
A．角钢B．方钢C．槽钢D．扁钢
参考答案：D
--- Is the new bicycle ________? --- No, It belongs to ________.
A．her, me
B．her, mine
C．hers, me
D．hers, mine.
由于胆汁中含有脂肪酶，故可促进脂肪的消化和吸收。
