轮养
参考答案：
又称轮捕轮放，是将多种且多规格的鱼类混养在同一池塘中，分次捕捞达到食用规格的个体并补放适量鱼种的养殖方式。
All these gifts must be mailed immediately__________ in time for Christmas.
A．in order to have received
B．in order to receive
C．so as to be received
D．so as to be receiving
关于病理性赘述的说法，正确的是（）。
A.联想松弛，内容散漫，缺乏主题
B.枝节联想过多，停滞不前，过分详尽描述细节问题
C.常见于精神分裂症
D.常见于抑郁症
E.常见于癫痫性精神障碍
