经商的目的之一是（）
A.分担行政职能
B.促进社会进步
C.行业均衡
参考答案：B
There was never any time for Kate to feel lonely, ________she was an only child.
A．ever since
B．now that
C．even though
D．even as
简述无机结合料稳定材料标准养生方法。
