install.packages("installr")library(installr)updateR() 当执行第一行代码时,首先需要选择国内的镜像链接,完毕后遇到报错: ... 停止执行 ERROR: lazy loading failed for package 'lifecycle' * removing 'C:/Users/shelhen/Documents/R/win-library/4.0/lifecycle' 下载的程序包在 ‘C:\Users\shelhen\AppDat...