第29届奥运会的举办城市是（）。
A.洛杉矶
B.东京
C.北京
D.巴塞罗纳
参考答案：C
已知（a+b）2=6，（a﹣b）2=2，那么a2+b2=（ ），ab=（ ）．
He was admitted to a famous university，________ was obvious that his situation had gone beyond his parents’ expectations.
A．what
B．it
C．as
D．and it
