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已知M是一个平面有限点集,则平面上存在到M中各点距离相等的点.(1)M中只有三个点(2)M中任意三点都不共线
A.条件(1)充分,但条件(2)不充分
B.条件(2)充分,但条件(1)不充分
C.条件(1)和条件(2)单独都不充分,但条件(1)和条件(2)联合起来充分
D.条件(1)充分,条件(2)也充分
E.条件(1)和条件(2)单独都不充分,条件(1)和条件(2)联合起来也不充分
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据统计,被指控抢劫的定罪率要远高于被指控贪污的定罪率。其重要原因是贪污案的被告能聘请收费昂贵的律师,而抢劫案的被告主要由法庭指定的律师辩护。以下哪项如果为真,最能支持题干的叙述?
A.被指控抢劫的被告,远多于被指控贪污的被告。
B.被告聘请的律师与法庭指定的律师一样,既忠实于法律,又努力维护委托人的合法权益。
C.被指控抢劫的被告中事实上犯罪的比例,不高于被指控贪污的被告相应的比例。
D.一些被指控抢劫的被告,有能力聘请收费昂贵的律师。
E.司法腐败导致对有权势的罪犯的庇护,而贪污等职务犯罪的构成要件是当事人有职权。
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某工厂有一员工宿舍住了甲、乙、丙、丁、戊、己、庚7人,每人每周需轮流值日一天,且每天仅安排一人值日。他们值日的安排还需满足以下条件:(1)乙周二或者周六值日;(2)如果甲周一值日,那么丙周三值日且戊周五值日;(3)如果甲周一不值日,那么己周四值日且庚周五值日;(4)如果乙周二值日,那么己周六值日。如果庚周四值日,那么以下哪项一定为假?
A.甲周一值日。
B.乙周六值日。
C.丙周三值日。
D.戊周日值日。
E.己周二值目。
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论说文:阅读下面的材料,写一篇700字左右的论说文,题目自拟。2019年6月25日下午,全国人大常委会分组审议《固体废物污染环境防治法修订草案》,生活垃圾分类的话题受到广泛关注,同时也引起了激烈的争论:究竟是否要进行垃圾拉圾分类?支持者认为,垃圾分类回收不仅可以减少占地、减少环境污染,还可变废为宝。垃圾分类能提高垃圾的资源价值和经济价值,是物尽其用的好方法。但是也有人反对,他们认为垃圾分类制度已经提出多年,但是直到现在,在北京、上海这样最发达的城市,也不能切实执行,何况小城市和乡村。到处都摆着分类的垃圾筒,但实际上都形同虚设。
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某烧杯装有一定体积的纯酒精,倒出50mL之后,加入纯水补充溶液至原体积,再倒出30mL,再加入纯水补充溶液至原体积,此时溶液的浓度为75%,则烧杯开始装有的纯酒精有()mL
A.300
B.350
C.380
D.435
E.500
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博雅公司的总裁发现,除非对公司进行改革,否则公司将会面临困境。而要对公司进行改革,就必须裁减公司富余的员工。而要裁减员工,国家必须有相应的失业保险制度。所幸的是博雅公司所在的国家,其失业保险制度是健全的。从上面的论述,可以确定以下哪项一定为真?Ⅰ.博雅公司裁减了员工。Ⅱ.博雅公司进行了改革。Ⅲ.博雅公司摆脱了困境。
A.只有Ⅰ
B.只有Ⅱ和Ⅲ
C.只有1和Ⅱ
D.Ⅰ、Ⅱ和Ⅲ
E.Ⅰ、Ⅱ和Ⅲ都不一定为真
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只要不起雾,飞机就能按时起飞。以下哪项如果为真,说明上述断定不成立?Ⅰ.没起雾,但飞机没能按时起飞。Ⅱ.起雾,但飞机仍然能按时起飞。Ⅲ.起雾,飞机航班延期。
A.只有Ⅰ
B.只有Ⅱ
C.只有Ⅲ
D.只有Ⅱ和Ⅲ
E.Ⅰ、Ⅱ和Ⅲ
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大山中学所有骑车上学的学生都回家吃午饭,因此,有些在郊区的大山中学的学生不骑自行车上学。为使上述论证成立,以下哪项关于大山中学的断定是必须假设的?
A.骑自行车上学的学生家都不在郊区
B.回家吃午饭的学生都骑自行车上学
C.家在郊区的学生都不回家吃午饭
D.有些家在郊区的学生不园家吃午饭
E.有些不回家吃午饭的学生家不在郊区
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中国要有一流的国家实力,必须有一流的教育。只有拥有一流的国家实力,中国オ能做出应有的国际贡献。以下各项都符合题干意思,除了?
A.中国难以做出应有的国际贡献,除非拥有一流的教育
B.只要中国拥有一流的教育,就能做出应有的国际贡献
C.如果中国拥有一流的国家实力,就不会没有一流的教育
D.不能设想中国做出了应有的国际贡献,但缺乏一流的教育
E.中国面临选择:或者没有做出应有的国际贡献,或者拥有一流的教育
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某工厂生产某种新型产品,一月份每件产品销售的利润是出厂价的25%(假设利润等于出厂价减去成本),二月份每件产品出厂价降低10%,成本不变,销售件数比一月份增加80%,则销售利润比一月份的销售利润增长()
A.6%
B.8%
C.15.5%
D.25.5%
E.以上选项均不正确
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将长、宽、高分别为12、9、6的长方体切割成正方体,且切割后无剩余,则能切割成相同正方体的最少个数为()
A.3
B.6
C.24
D.96
E.648
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最近实施的一项历史上最严格的禁止吸烟的法律,虽然尚未禁止人们在其家中吸烟,却禁止人们在一切公共场所和工作地点吸烟。如果这项法律得到严格执行,就会彻底保护上班人员免受二手烟的伤害。如果以下哪项陈述为真,最有力地削弱了上述论证?
A.上下班的人员吸入的汽车尾气要比吸二手烟的危害大得多。
B.诸如家教、护士、小时工等人员都在雇主的家里上班。
C.任何一项立法及其实施都不能完全实现立法者的意图。
D.这项控制吸烟的法律过高地估计了吸二手烟的危害。
E.有的场所需要吸烟,因此无法完全避免受二手烟的伤害。
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Text 3 Recently,a coalition of business and advocacy groups from around Washington gathered to kick off a campaign to enact a carbon pricing program Known as the Climate and Community Reinvestment Act of D.C.,the plan would place a new tax on all fossil fuels bought or sold,with the hope of ultimately discouraging the use of these polluting energy sources.The big-picture goal of this campaign is admirable:to address the everdeepening crisis of climate chaos by dissuading the continued use of coal,oil and gas.But unfortunately,the approach-one based in a world of financial markets,trading schemes and enticing new public revenue streams-is inherently flawed.Simply put,carbon pricing is a false solution to climate change and a distraction from real,effective climate solutions we must urgently pursue.To date,there is scant evidence to indicate that carbon taxes lower greenhouse gas emissions.In fact,the opposite is true.Recently Food&Water Watch reviewed the British Columbia carbon tax program,often cited by advocates as an example of success.From 2009(the first full year of the tax)t0 2014,emissions from taxed sources grew by 4.3 percent.And in the seven years after the carbon tax took effect,total gasoline sales increased by 7.37 percent.Supporters of such plans like to focus on a deceivingly simple notion that increasing the price of a consumer good will automatically reduce its use.But this just isn't the case when it comes to the purchase of necessities.People must heat their homes in winter,and they must commute to work,regardless of the cost.Those backing the D.C.carbon pricing plan like to note that revenue from the new tax would go toward investment in clean energy sources.But only 20 percent of the generated funds would be allocated in this manner.The rest would be shared out in tax breaks for businesses and rebates for consumers,another factor undercutting the notion that increased costs up front would change consumer behavior in the long run.Meanwhile,fossil fuel giants such as ExxonMobil are increasingly coming out in support of carbon pricing.This should be cause for alarm for anyone concerned with stamping out the use of the dirty energy sources these corporations profit from.Exxon knows that carbon taxes will do little to change the business-as-usual dependence on oil and gas that it relies on to continue operating and enriching shareholders.Furthermore,corporations such as Exxon rightly view carbon pricing schemes as a means of diverting energy and interest from tougher regulations that might actually encroach on their business plans and bottom lines.Despite what well-intentioned activists want to believe,there is no convenient,market-friendly solution to our serious climate condition.There is only the hard truth that we must tackle the problem at its source:We must stop using fossil fuels,and soon.The latest science indicates that in order to avoid the worst effects of deepening climate chaos,society must transition completely to clean,renewable energy by 2035
Fossil fuel giants____.
A.are expressing dissatisfaction with carbon pricing schemes
B.are reducing their dependence on dirty energy sources
C.view clean renewable energy as their future source of profits
D.see carbon pricing as distraction from tough rules against them
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近年来,我国海外代购业务量快速增长,代购者们通常从海外购买产品,通过各种渠道避开关税,再卖给内地顾客从中牟利,却让政府损失了税收收入,某专家由此指出,政府应该严厉打击海外代购的行为。以下哪项如果为真,最能支持上述论证?
A.近期,有位前空乘服务员在网上开设海外代购店而被我国地方法庭判定有走
B.国内一些企业生产的同类商品与海外代购产品相比,无论质量还是价格都缺
C.海外代购提升了人民的生活水平,满足了国内部分民众对于品质生活的追求。
D.去年,我国奢侈品海外代购规模几乎是全球奢侈品,国内门店销售额的一半,
E.国内民众的消费需求提升是伴随着我国经济发展而产生的经济现象,应以此
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Text 2 A study published in the International Journal of Business Administration found that what students read in college directly effects the level of writing they achieve.In fact,researchers found that reading content and frequency may exert more significant impacts on students'writing ability than writing instruction and writing frequency.Students who read academic journals,literary fiction,or general nonfiction wrote with greater svntactic SODhistication(more comDlex sentences)than those who read genre fiction(mysteries,fantasy,or science fiction)or exclusively web-based aggregators.The highest scores went to those who read academic journals;the lowest scores went to those who relied sotely on web-based content.Recent research also revealed that"deep reading"-defined as reading that is slow,immersive,rich in sensory detail and emotional and moral complexity-is distinctive from light reading-little more than the decoding of words.Deep reading occurs when the language is rich in detail,allusion,and metaphor,and taps into the same brain regions that would activate if the reader were experiencing the event.Deep reading is great exercise for the brain and has been shown to increase empathy,as the reader dives deeper and adds reflection,analysis,and personal subtext to what is being read.It also offers writers a way to appreciate all the qualities that make novels fascinating and meaningful-and to tap into his abllity to write on a deeper level.Light reading is equated to what one might read in online blogs,or"headline news"or"entertainment news"websites,particularly those that breezily rely on lists or punchy headlines,and even occasionally use emojis to communicate.These types of light reading lack a genuine voice,a viewpoint,or the sort of analyses that might stimulate thought.It's light and breezy reading that you can skim through and will likely forget within minutes.Deep reading activates our brain's centers for speech,vision,and hearing,all of which work together to help us speak,read,and write.Reading and writing engages Broca's area,which enables us to perceive rhythm and syntax;Wernicke's area,which impacts our perception of words and meaning;and the angular gyrus,which is central to perception and use oflanguage.These areas are wired together by a band of fibres,and this interconnectivity likely helps writers mimic and synchronize language and rhythms they encounter while reading.Your reading brain senses a cadence that accompanies more complex writing,which your brain then seeks to emulate when writing.
Which of the following would be the best title of the text?
A.Reading More Will Bring You Higher Score in Writing
B.Deep Reading Will Offer You More Benefits Than Light Reading
C.Deep Reading Will Activate Your Brain and Improve Your Writing
D.What You Read Matters More Than You Might Think
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某班有学生36人,期末各科平均成绩为85分以上的为优秀生,若该班优秀生的平均成绩为90分,非优秀生的平均成绩为72分,全班平均成绩为80分,则该班优秀生的人数是()
A.12
B.14
C.16
D.18
E.20
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在小于1000的正整数中,不含数字2的正整数的个数是()
A.640
B.700
C.720
D.728
E.729
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从6人中选4人分别到北京、上海、广州、武汉4个城市游览,要求每个城市各1人游览,每人只游览1个城市,且这6人中甲、乙两人不去北京游览,则不同的选择方案共有()
A.300种
B.240种
C.114种
D.96种
E.36种
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现有4个成年人和2个小孩,其中2人是母女;6人排成一排照相,要求每个小孩两边都是成年人,且1对母女要排在一起,则不同的排法有()种
A.56
B.60
C.72
D.84
E.96
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某次学校组织的春游中,参加的学生中获得过院奖学金的有130人,得过校奖学金的学生有100人,得过国家奖学金的有30人,又知只得过一种奖学金的学生有120人,三种都得过的有20人,那么,恰好得过两种奖学金的学生有()人
A.30
B.35
C.40
D.50
E.100
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