Which of the following is not an ethic rule for robots? A: to speak autonomously B: not to injure or damage people C: to obey orders given by humans D: to protect themselves

Which of the following statements about the enteric nervous system is TRUE? A: It functions both autonomously and by communication with the central nervous system B: Its neurons are embedded only in the tunica mucosa C: It controls secretion, but has no effect on motility in the intestine D: It innervates the esophagus and stomach, but not the intestines E: It’s not communicated with the central nervous

从酵母中克隆到一段DNA序列具有类似原核生物DNA复制起始点的功能，即 A: USR(upstream replicating sequence) B: LTR(long terminal sequence) C: ARS(autonomously replicating sequence) D: ORF( open reading frame)