柔性软风管按设计图示中心线长度以“m”为计量单位，包括弯头、三通、变径管、天圆地方等管件的长度，但不包括部件所占长度。( )
参考答案：对
He must be from America, ____ can be judged from his accent.
A．that
B．which
C．it
D．where
Within the context of the UN Convention on Contracts for the International Sale of Goods, explain when risk for loss or damage to goods passes from the seller to the buyer. (10 marks)
