减压塔的特点是（）。
A、多侧线的复合塔
B、塔顶不出产品
C、塔顶设置冷回流
D、塔顶没有冷回流
参考答案：A, B, C
Although the children _______ in age _______ seven to thirteen, they have a lot in common.
A．expand, from
B．differ, between
C．range, from
D．tell, between
如何处理支付能力与薪酬的关系？
