为提高初中生的身体素质，教育行政部门规定：初中生每天参加户外活动的平均时间不少于1小时．为了了解学生参加户外活动的情况，对部分学生参加户外活动的时间进行抽样调查，并将调查结果绘制成图（1）、图（2）两幅不完整的统计图，请你根据图中提供的信息解答下列问题：

（1）这次调查共调查了多少名学生；

（2）户外活动时间为1小时的人数为多少人，并补全图（1）；

（3）在图（2）中表示户外活动时间0.5小时的扇形圆心角的度数是多少

（4）本次调查中学生参加户外活动时间的众数是多少、中位数是多少；户外活动的平均时间是否符合要求？

    The panda is one of the ____ (animal) most in danger. There are about 1,000 pandas ____ (live) in nature reserves today. Zoos and research centers look after about 160 pandas. Scientists are studying ____ they live and more baby pandas are born in the zoos.

    Pandas live in the forests and mountains of Southwest China. They ____ (main) live on bamboo, and each panda ____ (need) to eat a lot of bamboo every day. The area of bamboo is becoming ____ (small) for many different reasons, ____ pandas have less and less land to live on. Pandas don't have many babies, and baby pandas often die. The situation is becoming very serious.

    Our government is working hard ____ (save) pandas. There are more than 30 nature reserves to protect pandas but these are not enough. The government has made a new plan to help pandas. The nature reserves will be bigger and the bamboo ____ (grow) better. Then the pandas will have enough food to eat and enough places to live in. Pandas born ____ the zoos may go back to live in the nature reserves.

下列关于细胞全能性的叙述，正确的是（　　）