已知P(﹣3,m)和Q(1,m)是抛物线y=2x2+bx+1上的两点. (1)求

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问题:

已知P(﹣3,m)和Q(1,m)是抛物线y=2x2+bx+1上的两点.

(1)求b的值;

(2)判断关于x的一元二次方程2x2+bx+1=0是否有实数根,若有,求出它的实数根;若没有,请说明理由;

(3)将抛物线y=2x2+bx+1的图象向上平移k(k是正整数)个单位,使平移后的图象与x轴无交点,求k的最小值.

考点:一元二次方程根的判别式二次函数的图像求二次函数的解析式及二次函数的应用平移
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一张方桌由一个桌面和四条桌腿组成,如果1m3木料可以制作方桌的桌面50个,或制作桌腿300条,现有5m3木料,请你设计一下用多少木料制作桌面,多少木料制作桌腿,才能使桌面与桌腿恰好配套?配套成的方桌是多少张?

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对急性细菌性痢疾的抗生素治疗,最有效的是下列哪一种()

A.复方磺胺甲基异恶唑

B.黄连素

C.氯霉素

D.第三代氟喹诺酮

E.呋喃唑酮

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Sony and Toyota are struggling. But one brand name is booming (繁荣) in Japan during the economic slowdown—Mickey Mouse.

According to the company that runs Tokyo Disneyland, Japan’s busiest theme park will be more packed than ever over Christmas and New Year’s Day. Despite the bad economy, it’s already been a record year for an escape which is cheaper than the average night out in pricey Tokyo.

“Here, economic depression (萧条) seems a world away,” visitor Namie Katsunuma said. “This is the only place where I can totally forget the economic worries and hardships of my life.”

The single mother’s salary at an auto factory was cut in November but, with her $500 yearly pass in hand, she makes the 95-km journey from her home to Tokyo Disneyland every couple of months.

The park’s operator, Oriental Land Co, estimates (估算) a record 26.5 million people will visit Tokyo Disneyland and its nearby sister park, Disneysea, during the financial year ending in March. The company is forecasting sales of a record $4.2 billion, up almost 10 percent.

“In a way, the economy works well for Tokyo Disneyland,” said Hiroshi Watanabe, an economist at the Tokyo-based Daiwa Research Institute. “Because of the economic depression, people have stopped buying cars and houses or going to Hawaii, and Tokyo Disneyland offers an affordable and pleasant alternative.”

Around the world, Disney’s theme parks have been a bright spot for the brand this year as people seem to look for an escape from bad times.

小题1:According to the passage, what happens to Tokyo Disneyland this year?

A.Fewer people visit it.

B.Less money is made.

C.It attracts more visitors.

D.Its sales have reached $4.2 billion.小题2:What can be the possible reason for Tokyo Disneyland’s boom?

A.It costs less money to play here than in any other theme park.

B.People have a new understanding of amusement.

C.The economic depression has changed people’s plans to spend money.

D.Visitors seek an escape from economic depression.小题3:What does the underlined word “alternative” mean in the sixth paragraph?

A.choice.

B.park.

C.time.

D.trip.小题4:According to the last paragraph, what is the writer probably going to write?

A.The theme parks that attract most visitors.

B.More examples of success of Disney theme parks.

C.Tokyo Disneyland’s plan for the next year.

D.The economic depression in other companies.

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浙江浙海服装进出口公司(3313910194)在对口合同项下进口蓝湿牛皮,委托浙江嘉宁皮革有限公司(3313920237)加工牛皮沙发革。承运船舶在帕腊纳瓜港装货启运,航经大阪,又泊停釜山港转“HANSA STAVANGER”号轮HV300W航次(提单号:HS03D8765)于2003年7月30日抵吴淞口岸申报进境。经营单位委托上海某货运代理公司持(229083100693号手册和310200103036124号入境货物通关单(代码:A)于次日向海关申报货物进口。

该货物法定计量单位为千克,海运费、港杂费合计1500美元,保险费为140美元。

请根据以上资料,填制进口报关单以下栏目:

“装货港”栏应填()。

A.香港

B.帕腊纳瓜

C.大阪

D.釜山

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带式输煤机系统的集中控制启动应按顺煤流方向进行。

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