This key doesn’t _________ into the lock.
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The children are happy at the school, but they do not have any _______.
Jack wants to be a brain ___________ after graduation from the medical university.
I have a __________ on my leg where that dog bit me.
作为科学发展观的根本方法，统筹兼顾深刻体现了（ ）在发展问题
A. 科学运用。
B. 自然辩证法
C. 唯心主义
D. 唯物主义
E. 唯物辩证法
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