古罗马（）曾是现代结构出现之前世界上跨度最大的建筑，其圆形正殿直径和高度都是43.43米
参考答案：万神庙
为节省时间，计量泵开车时可快速开吸入口阀引液体进入泵体。（）
China's GDP grew by 7.1 percent in the first half of this year, _______ proved its proactive macro-economic policies were effective
A．it
B．that
C．what
D．which
