1. After feeding breeding sows for 210 days, The results showed that The kittening quantity, average daily gain, surviving rate and ablactation weight in test group were higher than that of control group and the difference was marked (p < 0.05).
对种母猪进行了210天的饲养试验，结果表明：在产仔数、仔猪平均日增重、仔猪成活率和仔猪平均断奶个体重方面，试验组高于对照组，差异显著（P＜0.05）；
2. C There was no obvious difference in the behaviour of the same kittening Amur tiger between different years.
不同年份同一东北虎个体产仔行为无明显差异。
3. A kittening box I use an under-the-bed sweater box.
一个装小猫的盒子（我用的是放在床底下的装毛衣的盒子
4. The kittening behavior of female Amur tigersin captivity were observed by scanning sampling and all-occurrence sampling methods from the year of 1999 to 2003, which included 3571 times in the whole 194373 seconds by 22 tigers in the whole observation.
在黑龙江东北虎林园中，采用扫描取样法和所有事件取样法对半散放东北虎的产仔行为进行了连续5年（1999—2003）的观察。共观测产仔东北虎22头次，观察时间累计194 373秒，观察到各类行为共计3 571次。