（）可导致皮带转不起来。
A.料流偏
B.头轮有杂物卡住
C.栏板下沉
参考答案：B
24.The terrorists said that anyone caught ______ on them would be killed.
A．attacking
B．fighting
C．knocking
D．Informing
瑜伽的构成要素？
