个人认为这个句子应该从整体的逻辑来把握,"the national Academy of science has urged nation' 做三件事, revamp computer security procedures, institute new emergency response teams, creat a special nongovernment organization.最后的并列事件用and,这些做法的目的是 to take charge of computer security planning.所以说不会将最后的部分看做定语