题干

下列结论中:①a2•a4=a8;②1010÷105=102;③(x25=x7;④(3×2﹣12÷2)0=1;⑤平移只改变图形的位置,不改变图形的形状和大小;⑥垂直于同一条直线的两条直线互相平行,所有正确结论的序号有____ 

上一题 下一题 0.0难度 选择题 更新时间:2019-02-19 11:36:22

答案(点此获取答案解析)

同类题1

阅读短文,根据其内容回答问题。
   The Internet is becoming more and more important in our life. You can get a lot of information, make friends. share your ideas, send emails and chat at any time or anywhere. However, imagine you receive an email that looks something like this: ARE YOU GOING TO CLASS TODAY? How does reading this message make you feel? Why did the sender use all capital(大写) letters? Was he or she angry, or did that person just forget to turn off the "Cap lock" on the computer? The fact is, using all capital letters in an email means that people shout online. Virginia Shea' s book, Netiquette, lists some ways of communicating(交流) properly with others on the Internet. Following are some of her suggestions.
   ◆First, always remember that you are sending messages to a real person, not just to a computer. Don't write anything that you wouldn't say to someone's face. Also, remember that the receiver cannot hear your voice, or see the expression(表情)on your face, so make sure your meaning is clear.
   ◆Don’t do anything online that you wouldn’t do in real life. Don’t take anything without paying for it . Don’t use information that someone else has written, and say it's yours. Don’t read other people’s email—you wouldn't open your next –door neighbor’s mailbox and open their mail, right? Do share your knowledge of the Internet with others. It’s a big place with lots of information, and there are many new things to discover.
   ◆Remember that people judge(判断) you by your words as well as your actions, so do try to write well. Send polite, well-written email messages to others. If you’re not sure about how to spell a word or which phrase to use, look it up. There are lots of helpful books and websites.
   ◆It's OK to share your ideas online like chat rooms or message boards, but don't argue(争吵) with people . ‘Flame wars' in online discussions can be interesting to read, but are often unfair(不公平) to other members of the group. Share your ideas, but remember that fighting on or offline is just not correct.
   When you're online, just as in "real" life, try to respect (尊重) other people's space and feelings. Remember, you're not the only one traveling on this highway!

同类题4

阅读《时代呼唤创新型人才》,完成后面小题。
         ①时代呼唤________________________的创新型人才。
         ②当前的时代是经济全球化的时代,经济、科研、军事、文化等领域的竞争日益激烈,人们要求创新型人才首先应当是最具创意和活力的。他们具有强烈的创造意识和创造激情,富于怀疑性批评性的追根究底的求索精神,而又有着知识创新和技术创新的能力,他们充满探索欲、求知欲、进取欲,具有永不停息的求新求变的勇气和不畏艰险、锲而不舍的意志和毅力。回溯科学史,没有对托勒密宇宙体系的背叛,哪来伟大的哥白尼变革?没有对亚里士多德物理理论的怀疑,哪来伽利略在运动学上的重大变革?没有对牛顿经典力学的超越,又怎么会有爱国斯坦的相对论
        ③今天,随着科学技术的综合化、整体化及人文科学相互渗透、融合的趋势加速,随着社会主义市场经济的逐步建立,社会对人才的多样性、适应性需求日益增强,人们要求创新型人才也应当是多功能的。他们不仅一专一能,而且多专多能,具有多才多艺的特点。仅以当前迅猛兴起的信息网络而言,它就熔铸了计算机、微电子、光电传输、卫星技术、自动化、半导体、多媒体等多学科多领域的知识和技术。尤其是网络经济、网络文化的发展,越来越需要集科技、文学、经贸、外语于一身的人才。
        ④经济全球化时代,既充满激烈竞争,又亟待协调与合作,人们要求创新型人才还应当是善于协作的。他们善于协调人际关系,具有兼容并包的胸怀和团队拼搏的精神,他们善于在传统与现实、历史与未来、科学与人文、理论与经验、思想与实践、精神与效益、个人与社会等等关系之间,不断地进行协调,化解矛盾,防止内耗,同心协力应对各种严峻的挑战。这样,才有可能赢得机遇,竭尽潜力,不断创新,不断前进。