问题描述：
p5 3 it was in 1949 () the people's republic of china was founded
it was in 1949 () the people's republic of china was founded
a when
b that
c in which
d which
选哪个,为什么?
it was in 1949 () the people's republic of china was founded
a when
b that
c in which
d which
选哪个,为什么?
问题解答：
我来补答展开全文阅读