单项选择题

如果用户要取消AutoCAD当前命令的操作,应按下( )。
A、Ctrl+A
B、Ctrl+X
C、Esc
D、Ctrl+Enter

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单项选择题
33. Which of the following statement about deduction is true?
A.The premise is the key to the credibility of a deductive conclusion.
B.Just one word will not change the premise from fact to fiction.
C.The conclusions should be made probable by the truth of the premises
D.A major premise is a statement of general truth dealing with individual examples rather than categories
判断题
Sea civilization, in a broad sense, means Aegean civilization, a general term for the Bronze Age civilizations of Greece around the Aegean Sea.() A、正确 B、错误
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