两个正规式等价，当且仅当它们所描述的正规集相同。()

未分类题Fogg believes that the future mobile phones could notA．teach illiterates to learn alphabets.B．understand the user's ideas and points.C．help users exercise their languages.D．become more direct and elegant.

未分类题It is stated in Paragraph 4 that those who support pushing the bystander to stop the trolleyA．are brutal and relentless.B．display the same emotional aversion.C．feel guilty about doing that.D．have struggled to make the decision.

未分类题It can be inferred from the text that the reason for building a continuous span is thatA．the construction was dangerous because of severe weather.B．the engineers wanted to build the longest suspension bridge.C．building a floating tunnel or a series of bridges was impossible.D．ferry boats covered too many pointless miles and wasted time.

未分类题From the first two paragraphs, we can learn thatA．moral 'reasoning' is actually based on reason, not on emotion.B．philosophers have resolved the dilemma between reason and emotion.C．emotion plays a more important role than reason in moral judgment.D．most philosophers pursue the utilitarian goal in the trolley problem.

判断题源程序中的每个变量有两种重要的属性，一是在数据区给它们分配的存储单元地址，二是在目标程序运行时存放在相应单元中的值。()