The problem confronting us today is not dissimilar from that which the nation confronted in the 1960s.
麻烦老师剖析一下：
that是指什么？
which是confronted的宾语吧？我搞不懂为何要用confronted？
后面是定语从句，confront是vt及物动词，等于...that the nation confronted which...若是如此，confronted是定语从句中的谓语，那这句话的意思是呢？
confront 为及物动词，有不一样的语义。比如《韦氏高阶》
a:to deal with
Firemen regularlyconfrontdanger.
Theyconfronted[=encountered] many obstacles along the way.
c :to be a problem for
We know of the financial problemsconfronting[=facing] local schools.
The problem confronting us today中，confront 为to be a problem for的意思。
which the nation confronted中，confront为to deal with 的意思。
所以，大家可以说：
Many problems confront us.
也可以说，We confront many problems.
that which= 融合型关系代词what。本句中that=the problem，the为前照应特指，即后面的限制性定语从句明确problem的所指。
