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
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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
以下材料可以用作电解液有机溶剂的是()
A. 碳酸丙烯酯(PC)
B. 碳酸二甲酯(DMC)
C. 碳酸二乙酯(DEC)
D. 碳酸乙烯酯(EC)