关于x的方程x²+ax+b-1=0有实根。
（1）a+b=0。（2）a-b=0。
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（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(2)单独都不充分，但条件(1)和条件(2)联合起来也不充分。相关问题推荐
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John Gottman, the marriage expert, explains that we quickly “thin slice” information reliably only after we ground such snap reactions in “thick sliced” long-term study. When Dr. Gottman really wants to assess whether a couple will stay together, he invites them to his island retreat for a much longer evaluation: two days, not two seconds.Our ability to mute our hard-wired reactions by pausing is what differentiates us from animals: dogs can think about the future only intermittently or for a few minutes. But historically we have spent about 12 percent of our days contemplating the longer term. Although technology might change the way we react, it hasn’t changed our nature. We still have the imaginative capacity to rise above temptation and reverse the high-speed trend.1.The time needed in making decisions may（ ）.2.Our reaction to a fast-food logo shows that snap decisions （ ）.3.To reverse the negative influences of snap decisions, we should （ ）.4.John Gottman says that reliable snap reactions are based on （ ）.5.The author’s attitude toward reversing the high-speed trend is（ ）.'>
Scientists have found that although we are prone to snap overreactions, if we take a moment and think about how we are likely to react, we can reduce or even eliminate the negative effects of our quick，hard-wired responses.Snap decisions can be important defense mechanisms； if we are judging whether someone is dangerous, our brains and bodies are hard-wired to react very quickly，within milliseconds. But we need more time to assess other factors. To accurately tell whether someone is sociable, studies show, we need at least a minute, preferably five. It takes a while to judge complex aspects of personality, like neuroticism or open-mindedness.But snap decisions in reaction to rapid stimuli aren’t exclusive to the interpersonal realm. Psychologists at the University of Toronto found that viewing a fast-food logo for just a few milliseconds primes us to read 20 percent faster, even though reading has little to do with eating. We unconsciously associate fast food with speed and impatience and carry those impulses into whatever else we’re doing. Subjects exposed to fast-food flashes also tend to think a musical piece lasts too long.Yet we can reverse such influences. If we know we will overreact to consumer products or housing options when we see a happy face ( one reason good sales representatives and real estate agents are always smiling)，we can take a moment before buying. If we know female job screeners are more likely to reject attractive female ap-plicants ,we can help screeners understand their biases—or hire outside screeners. 'John Gottman, the marriage expert, explains that we quickly “thin slice” information reliably only after we ground such snap reactions in “thick sliced” long-term study. When Dr. Gottman really wants to assess whether a couple will stay together, he invites them to his island retreat for a much longer evaluation: two days, not two seconds.Our ability to mute our hard-wired reactions by pausing is what differentiates us from animals: dogs can think about the future only intermittently or for a few minutes. But historically we have spent about 12 percent of our days contemplating the longer term. Although technology might change the way we react, it hasn’t changed our nature. We still have the imaginative capacity to rise above temptation and reverse the high-speed trend.1.The time needed in making decisions may（ ）.2.Our reaction to a fast-food logo shows that snap decisions （ ）.3.To reverse the negative influences of snap decisions, we should （ ）.4.John Gottman says that reliable snap reactions are based on （ ）.5.The author’s attitude toward reversing the high-speed trend is（ ）.
A.predetermine the accuracy of our judgment B.prove the complexity of our brain reaction C.depend on the importance o£ the assessment D.vary according to the urgency of the situation
问题2：
A.can be associative B.are not unconscious C.can be dangerous D.are not impulsive
问题3：
A.trust our first impression B.think before we act C -
Over the past decade, many companies had perfected the art of creating automatic behaviors—habits— among consumers. These habits have helped companies earn billions of dollars when customers eat snacks or wipe counters almost without thinking, often in response to a carefully designed set of daily cues. “ There are fundamental public health problems, like dirty hands instead of a soap habit, that remain killers only because we can’t figure out how to change people’s habits, said Dr. Curtis, the director of the Hygiene Center at the London School of Hygiene & Tropical Medicine. “We wanted to learn from private industry how to create new behaviors that happen automatically. ’’The companies that Dr. Curtis turned to—Procter & Gamble, Colgate-Palmolive and Unilever—had invested hundreds of millions of dollars finding the subtle cues in consumers’ lives that corporations could use to introduce new routines.If you look hard enough, you’ll find that many of the products we use every day—chewing gums, skin moisturizers ,disinfecting wipes, air fresheners, water purifiers, health snacks, teeth whiteners, fabric softeners, vitamins—are results of manufactured habits. A century ago, few people regularly brushed their teeth multiple times a day. Today, because of shrewd advertising and public health campaigns, many Americans habitually give their pearly whites a cavity-preventing scrub twice a day, often with Colgate, Crest or one of the other brands.A few decades ago, many people didn’t drink water outside of a meal. Then beverage companies started bottling the production of far-off springs, and now office workers unthinkingly sip bottled water all day long. Chewing gum, once bought primarily by adolescent boys, is now featured in commercials as a breath freshener and teeth cleanser for use after a meal. Skin moisturizers are advertised as part of morning beauty rituals, slipped in between hair brushing and putting on makeup.“ Our products succeed when they become part of daily or weekly patterns，” said Carol Berning, a consumer psychologist who recently retired from Procter & Gamble, the company that sold S 76 billion of Tide, Crest and other products last year. “Creating positive habits is a huge part of improving our consumers’ lives, and it’s essential to making new products commercially viable. ”Through experiments and observation, social scientists like Dr. Berning have learned that there is power in tying certain behaviors to habitual cues through ruthless advertising. As this new science of habit has emerged, con-troversies have erupted when the tactics have been used to sell questionable beauty creams or unhealthy foods. (413 words)1.According to Dr. Curtis, habits like hand washing with soap（ ）.2.Bottled water, chewing gum and skin moisturizers are mentioned in Paragraph 5 so as to （ ）.3.Which of the following does NOT belong to products that help create people’s habits?4.From the text we know that some of consumers’ habits are developed due to （ ）.5.The author’s attitude toward the influence of advertisement on people’s habits is（ ）.
A.should be further cultivated B.should be changed gradually C.are deeply rooted in history D.are basically private concerns
问题2：
A.reveal their impact on people’s habits B.show the urgent need of daily necessities C.indicate their effect on people’s buying power D.manifest the significant role of good habits
问题3：
A.Tide. B.Crest. C.Colgate. D.Unilever.
问题4：
A.perfected art of products B.automatic behavior creation C.commercial promotions D.scientific experiments
问题5：
A.indifferent B.negative C.positive D.biased -
因业务需要，某公司欲将甲、乙、丙、丁、戊、己、庚7个部门合并到丑、寅、卯3个子公司。已知:(1)一个部门只能合并到一个子公司；(2)若丁和丙中至少有一个未合并到丑公司,则戊和甲均合并到丑公司；(3)若甲、己、庚中至少有一个未合并到卯公司，则戊合并到寅公司且丙合并到卯公司。根据上述信息，可以得出以下哪项?
A.甲、丁均合并到丑公司B.乙、戊均合并到寅公司C.乙、丙均合并到寅公司D.丁、丙均合并的丑公司E.庚、戊均合并到卯公司 -
Wholesale prices in July rose more sharply than expected and at a faster rate than consumer prices,（1）hat businesses were still protecting consumers （2） the full brunt (冲 击) of higher energy costs.
The Producer Price Index （3） measures what producers receive for goods and services, （4） 1 percent in July. The Labor Department reported yesterday. Double （5） economists had been expecting and a sharp turnaround from flat prices in June. Excluding （6） and energy. the core index of producer prices rose 0.4 percent, （7） than the 0.1 percent that economists had （8） . Much of that increase was a result of an （9） increase in car and truck prices.
On Tuesday, the Labor Department said the （10） that consumers paid for goods and services in July were （11） 0.5 percent over all, and up 0.1 percent, excluding food and energy.
（12） the overall rise in both consumer and producer prices （13） caused by energy costs, which increased 4.4 percent n the month. (Wholesale food prices （14） 0.3 percent in July. （15） July 2004, Wholesale prices were up 4.6 percent, the core rate （16） 2.8 percent, its fastest pace since 1995.
Typically, increases in the Producer Price Index indicate similar changes in the consumer index （17） businesses recoup (补偿) higher costs from customers. （18） for much of this expansion, which started （19） the end of 2001, that has not been the （20） . In fact, many businesses like automakers have been aggressively discounting their products.
A.indicate B.to indicate C.indicating D.indicated 问题2： A.of B.to C.by D.from 问题3： A.that B.which C.it D.this 问题4： A.rise B.rises C.rose D.raised 问题5： A.that B.what C.which D.this 问题6： A.food B.grain C.crop D.diet 问题7： A.less B.lower C.higher D.more 问题8： A.said B.reported C.calculated D.forecast 问题9： A.expectable B.unexpected C.expectation D.expecting 问题10： A.prices B.costs C.charges D.values 问题11： A.down B.from C.to D.up 问题12： A.Much B.Most C.Most of D.Much of 问题13： A.was B.were C.is D.are 问题14： A.fall B.fell C.falls D.has fallen 问题15： A.Comparing with B.In comparison C.Compared with D.Compare to 问题16： A.dropped B.declined C.lifted D.climbed 问题17： A.as B.so C.while D.when 问题18： A.And B.But C.Yet D.Still 问题19： A.at B.by C.in D.to问题20： A.condition B.situation C.matter D.case -
Being a good parent is what every parent would like to be. But defining what it means to be a good parent is undoubtedly very（1） , particularly since children respond differently to the same style of parenting. A calm, rule-following child might respond better to a different sort of parenting than, （2） , a younger one sibling.
（3） , there’s another sort of parent that’s easier to （4） : a patient parent. Children of every age benefit from patient parenting. Still, （5） , every parent would like to be patient, this is no easy（6） . Sometimes, parents get exhausted and are unable to maintain a（7） style with their kids. I understand this.You’re only human, and sometimes your kids can（8） you just a little too far. And then the（9） happens: You lose your patience and either scream at your kids or say something that was too（10） and does nobody any good. You wish that you could （11） the clock and start over. We’ve all been there. （12） , even though it’s common, it’s vital to keep in mind that in a single moment of fatigue, you can say something to your child that you may（13） for a long time. This may not only do damage to your relationship with your child but also（14） your child’s self-esteem.If you consistently lose your（15） with your kids, then you are inadvertently modeling a lack of emotional control for your kids. We are all becoming increasingly aware of the（16） of modeling patience for the younger generation. This is a skill that will help them all throughout life. In fact, the ability to maintain emotional control when（17） by stress is one of the most significant of all life’s skills.
Certainly, it’s （18） to maintain patience at all times with your kids. A more practical goal is to try,， to the best of your ability, to be as tolerant and composed as you can when faced with（19） situations involving your children. I can promise you this: As a result of working toward this goal, you and your children will benefit and（20） from stressful moments feeling better physically and emotionally.
A.pleasant B.tricky C.tedious D.instructive问题2： A.at once B.in addition C.for example D.by accident问题3： A.Fortunately B.Occasionally C.Accordingly D.Eventually问题4： A.amuse B.train C.assist D.describe问题5： A.once B.because C.unless D.while问题6： A.choice B.answer C.task D.access问题7： A.formal B.tolerant C.rigid D.critical问题8： A.move B.send C.drag D.push问题9： A.inevitable B.illogical C.mysterious D.suspicious问题10： A.boring B.harsh C.naive D.vague问题11： A.turn back B.take apart C.set aside D.cover up问题12： A.Overall B.Instead C.otherwise D.However问题13： A.believe B.regret C.miss D.like问题14： A.justify B.raise C.affect D.reflect问题15： A.bond B.time C.race D.cool16.问题16： A.nature B.secret C.context D.importance17.问题17： A.confronted B.defeated C.cheated D.confused18.问题18： A.strange B.terrible C.hard D.wrong19.问题19： A.exciting B.trying C.Surprising D.changing20.问题20： A.withdraw B.hide C.emerge D.escape