A.He couldn't make any sense out of his course. B.He hash' t taken more than one philosophy course. C.He is a philosophy major. D.He hasn't taken any philosophy course in that department.
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举一反三
【简答题】左侧选项是S7-200 PLC梯形图中的常见的基本符号,请在右侧选项中选出它们的名称。A. B. C.