既是可数名词又是不可数名词，主要看具体表达的意思。当用来表示感染时，感染是一个不可数名词。当用来表示传染病时，感染是一个可数名词。因此，感染既是可数名词，也是不可数名词。
I opened Sharepoint 2010 Central Admin and as per normal, was prompted for my login details. As I did not know the details, I closed after a few guesses/changing the default account.
加载中,请稍侯......