黄山风景天下闻名,故有“天下第一奇山”之称,称为“黄山四绝”的是云海、奇松、怪石、温泉。( )
参考答案:对
Recently I bought an ancient Chinese vase, _______ was very reasonable.
A.which price
B.the price of which
C.its price
D.the price of whose
碳钢管焊接时允许的最低环境温度为()。