The gallery takes a cut of the artwork sold, with prices_______ from $1 to $100.
A. ranged
B. ranging
C. being ranged
D. range
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Kirl and I entered the art room, completely __________ the rule that no student may enter the art room without permission.
A. to ignore
B. ignored
C. ignoring
D. to be ignored
Back from his two-year medical service in Africa, Dr. Lee was very happy to see his mother_________good care of his family at home.
A. taking
B. taken
C. to take
D. be taken
测定长期趋势方法中,可以形成数学模型的是()
A. 时距扩大法
B. 移动平均法
C. 最小平方法
D. 季节指数法
以下不属于电解液组成成分的是()?
A. 有机溶剂
B. 粘结剂
C. 锂盐
D. 添加剂