唯物辩证法与形而上学的根本分歧和斗争焦点在于是否承
A. 事物是客观存在的
B. 事物是永恒运动的
C. 事物是普遍联系的
D. 事物的内部矛盾是其发展的根本 动 力
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It's ages _______her.
A. since I saw
B. that I didn't see
C. since I didn't see
D. ago I saw
________you study harder,you 'll never pass the exam
A. If
B. Until
C. Unless
D. because
进行有名值等值电路计算式,变压器的变比为( )
A. 从基本级看过去的变比
B. 额定变比
---What did you do the day before yesterday?---I __________ for an English test.
A. study
B. studied
C. studying
D. studies