题目

Robots that can chat, find misplaced glasses, draw airplanes and play with your children are attracting thousands of visitors during an expo in Tokyo as Japan adapts to changes in society.Robots, such as the sound-sensitive Chapit, answer simple questions and even joke with people to help the solitary fight loneliness and stay alert (机警的) in old age. “Many old people in Japan live alone and have no one to talk to,” said Kazuya Kitamura, a representative of the expo organizer. “Communication robots stay together with old people and don’t mind listening to the same stories over and黑曲霉发酵可以产生木聚糖酶，该酶可以将木聚糖（植物细胞壁中的主要成分之一）降解为木糖．木聚糖酶是一种很有应用价值的发酵产品，如图表示生产该酶的连续发酵设置．（1）根据物理性质，该发酵过程使用的培养基属于 ．根据工艺流程可知，黑曲霉的新陈代谢类型属于 型．（2）从加料口输入的培养基必须经过严格的 处理．根据图示可知，发酵过程需要严格控制 与搅拌速度等条件．（3）在大规模的发酵生产中，需要将选育出的优良菌种经过多次的 ，当达到一定数量后再接种．接种的菌种最好处于生长的 期．（4）此工艺流程（连续培养）以一定的速度不断添加新的培养基，同时又以同样的速度放出旧的培养基，可大大提高生产效率，道理在于 ．