落纤率
参考答案:
表示落棉中纤维重量占落棉重量的百分数。
All the customers were warned to watch ____ for the fierce dog outside the shop.[ ]
A. on
B. over
C. at
D. out
K线理论中,价格的变动主要体现在( )。
A.开盘价
B.收盘价
C.最高价
D.最低价