到目前为止,中国考古学界发现的最早的猿人是云南的元谋猿人。元谋猿人距今大概在:()
A、近二百万年前
B、一百万年前
C、一百五十万年前
D、五十万年前
参考答案:A
I was born in Shanghai ______ we live in Beijing now. [ ]
A. so
B. and
C. after
D. but
电信资费标准的制定原则是什么?