Can you be too beautiful? It is hardly a problem that most of us have to bother — as much as we might like to dream that it were the case. Yet the blessings and curses of beauty have been a long-s
As the US wakes up to China’s rising status (地位) as an economic and strategic competitor, US parents are urging their children to learn Chinese, reports Julian Borger. The US is being swe
中，且
、
、
成等差数列，则
的值为（ ）
B．
C．
D．
，得：
，∴
，选B