2008年1月9日，我国黄金期货合约在( )上市交易。
A．郑州商品交易所
B．大连商品交易所
C．上海期货交易所
D．中国金融期货交易所
参考答案：C
合模力
The place _____ the bridge is supposed to be built should be _____ the cross-river traffic is heaviest.
A．which; where
B．at which; which
C．at which; where
D．which; in which
