求助555

求解：为什么下载R包的时候显示不能连接到吊销服务器，**包在R3.6.0不可用

> install.packages('spdep')
--- 在此連線階段时请选用CRAN的鏡子 ---
Warning: failed to download mirrors file (无法打开URL'https://cran.r-project.org/CRAN_mirrors.csv'); using local file 'D:/R-3.6.0/doc/CRAN_mirrors.csv'
Warning: 无法在貯藏處https://mirror-hk.koddos.net/CRAN/src/contrib中读写索引:
  无法打开URL'https://mirror-hk.koddos.net/CRAN/src/contrib/PACKAGES'
Warning: 无法在貯藏處https://mirror-hk.koddos.net/CRAN/bin/windows/contrib/3.6中读写索引:
  无法打开URL'https://mirror-hk.koddos.net/CRAN/bin/windows/contrib/3.6/PACKAGES'
Warning messages:
1: In download.file(url, destfile = f, quiet = TRUE) :
  InternetOpenUrl失败:’不能连接到吊销服务器，或者未能获得最终响应。'
2: package ‘spdep’ is not available (for R version 3.6.0)

?
> chooseCRANmirror()
Warning: failed to download mirrors file (无法打开URL'https://cran.r-project.org/CRAN_mirrors.csv'); using local file 'D:/R-3.6.0/doc/CRAN_mirrors.csv'
Warning message:
In download.file(url, destfile = f, quiet = TRUE) :
  InternetOpenUrl失败:’不能连接到吊销服务器，或者未能获得最终响应。'




还有为什么有时候下载的时候镜像都显示不出来，感觉要让R软件的这些状况折磨疯了