道士戴的巾有九种是哪九巾？
参考答案：
道士戴的帽，称“巾”有九种称“九巾”是：混元巾、庄子巾、纯阳巾、九梁巾、浩然巾、逍遥巾、三教巾、一字巾、太阳巾。
In a sports team each player has a clear role，and there are few occasions ________members are confused or uncertain about their roles.
A．whose
B．that
C．when
D．which
研究元素丰度有何意义？
