某机构向12位教师征题，共征集到5种题型的试题52道。则能确定供题教师的人数。（1）每位供题教师提供的试题数相同。（2）每位供题教师提供的题型不超过2种。
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
-
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 -
t="" make="" anything="" anymore,"="" he="" told="" fox="" news,="" while="" defending="" his="" own="" made-in-mexico="" clothing="" line. Without question, manufacturing has taken a significant hit during recent decades, and further trade deals raise questions about whether new shocks could hit manufacturing. But there is also a different way to look at the data. Across the country, factory owners are now grappling with a new challenge: instead of having too many workers, they may end up with too few. Despite trade competition and outsourcing, American manufacturing still needs to replace tens of thousands of retiring boomers every years. Millennials may not be that interested in taking their place, other industries are recruiting them with similar or better pay. For factory owners, it all adds up to stiff competition for workers－and upward pressure on wages. "They're harder to find and they have job offers," says Jay Dunwell, president of Wolverine Coil Spring, a family-owned firm, "They may be coming [into the workforce], but they've been plucked by other industries that are also doing an well as manufacturing," Mr. Dunwell has begun bringing high school juniors to the factory so they can get exposed to its culture. At RoMan Manufacturing, a maker of electrical transformers and welding equipment that his father cofounded in 1980, Robert Roth keep a close eye on the age of his nearly 200 workers, five are retiring this year. Mr. Roth has three community-college students enrolled in a work-placement program, with a starting wage of $13 an hour that rises to $17 after two years. At a worktable inside the transformer plant, young Jason Stenquist looks flustered by the copper coils he's trying to assemble and the arrival of two visitors. It's his first week on the job. Asked about his choice of career, he says at high school he considered medical school before switching to electrical engineering. "I love working with tools. I love creating." he says. But to win over these young workers, manufacturers have to clear another major hurdle: parents, who lived through the worst US economic downturn since the Great Depression, telling them to avoid the factory. Millennials "remember their father and mother both were laid off. They blame it on the manufacturing recession," says Birgit Klohs, chief executive of The Right Place, a business development agency for western Michigan. These concerns aren't misplaced: Employment in manufacturing has fallen from 17 million in 1970 to 12 million in 2013. When the recovery began, worker shortages first appeared in the high-skilled trades. Now shortages are appearing at the mid-skill levels. "The gap is between the jobs that take to skills and those that require a lot of skill," says Rob Spohr, a business professor at Montcalm Community College. "There're enough people to fill the jobs at McDonalds and other places where you don't need to have much skill. It's that gap in between, and that's where the problem is." Julie Parks of Grand Rapids Community points to another key to luring Millennials into manufacturing: a work/life balance. While their parents were content to work long hours, young people value flexibility. "Overtime is not attractive to this generation. They really want to live their lives," she says.
1.Jay Deuwell（ ）2.Jason Stenquist （ ）3.Birgit Klohs （ ）4.Rob Spohr （ ）5.Julie Parks （ ）
'>The decline in American manufacturing is a common refrain, particularly from Donald Trump. "We don't make anything anymore," he told Fox News, while defending his own made-in-Mexico clothing line.Without question, manufacturing has taken a significant hit during recent decades, and further trade deals raise questions about whether new shocks could hit manufacturing.But there is also a different way to look at the data.Across the country, factory owners are now grappling with a new challenge:
-
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 -
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。