函数f(x)=x3-3x2-9x+a的图像经过四个象限的充要条件( )。A.a>0

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问题:

函数f(x)=x3-3x2-9x+a的图像经过四个象限的充要条件( )。

A.a>0
B.a<0
C.-10<a<30
D.-5<a<27

考点:教师招聘考试中学教师招聘笔试教师公开招聘考试小学数学
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科举制以国家的力量倡导读书,客观上为普及文化、传播文明发挥了积极作用,依考试成绩择优录用,也激励了读书人勤学苦读的上进心。在古代科举考试中,殿试是最高级别的考试,它首先开创于

A.隋朝

B.唐朝

C.北宋

D.明朝

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患者,女性,19岁,体检时发现甲状腺Ⅰ度肿大,表面平滑,质地较软,患者无不适,查血清T4、T3正常,血清TSH水平正常。

该患者最可能的诊断是()。

A.甲状腺功能亢进症

B.甲状腺肿

C.甲状腺炎

D.植物神经功能紊乱

E.甲状腺功能低下

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读“某民居区在不同季节的景观图”(图甲、图乙)和“四地年气温和年降水量资料统计图”(图丙),回答1~3题。

1、图丙气候资料反映的是,①②③④四地一年中各月均温的变化幅度与年降水量的大致范围(如④地一年中月均温低则-20℃,高则10℃,年降水量在0mm~250mm)。据此推测照片中民居环境最可能出现在[ ]

A、①地

B、②地

C、③地

D、④地

2、该民居区最有可能位于[ ]

A、东欧地区

B、南亚地区

C、北非地区

D、西亚地区

3、关于①②③④四地气候的说法,正确的是[ ]

A、①地降水类型主要为对流雨

B、②地终年受西风控制

C、③地最大分布地区在南美洲

D、④地常爆发洪涝灾害

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下列哪种疾病可经过垂直传播()

A.麻疹

B.猩红热

C.甲型肝炎

D.流行性乙型脑炎

E.病毒性乙型肝炎

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More than 600, 000 tourists from the Chinese mainland visited Taiwan last year, fulfilling expectations despite the impact of H1N1 flu and the global economic downturn.

A total of 606, 100 mainland tourists visited Taiwan in the past year, with each spending nearly $1, 800 on the island, including accommodation and shopping, Shao Qiwei, chairman of the Beijing-based Association for Tourism Exchange Across the Taiwan Straits, said on Friday.

“We see good cooperation between tourism industries across the Straits taking shape,” Shao said. Since July 2008, when Taiwan first opened to mainland tourists, about 660, 000 mainland tourists have visited the island and spent $1.13 billion there, benefiting local transportation as well as the retail, entertainment and health industries.

In four months starting August last year, mainland tourists spent $65.72 million through UnionPay payment cards, figures from mainland bankcard association China UnionPay showed.

“Years of isolation between the two sides have made Taiwan an attractive place for mainland tourists,” said Zheng Lijuan, deputy (副的) general manager of CITS International MICE Co. Ltd.

But under the impact of H1N1 flu since May, the number of mainland tourists to Taiwan had also dropped sharply, leading to industry insiders(内部的人)casting doubt as to whether the goal of attracting 600, 000 mainland tourists to Taiwan in 2009 could be achieved.

Despite the unfavorable conditions, a string of relaxed rules last year have spurred (刺激) the interest of mainland tourists in visiting Taiwan.

In the past year, Taiwan has opened to mainland residents in 25 provinces, up from the initial 13 provinces. Relaxed rules have also allowed five tourists to form a group to visit Taiwan, instead of the initial requirement of at least 10 tourists. Mainland tourists can also stay in Taiwan for a maximum of 15 days, instead of the initial 10 days.

Combined with mainland business groups, more than 900, 000 mainland travelers visited Taiwan in 2009, Christine Lai, director of the Taiwan Strait Tourism Association, told China Daily.

Without releasing the goal for this year, Lai expressed hopes that mainland tourists would head to Taiwan on second or even third visits.

66. Why do mainlanders like to visit Taiwan?

A. Taiwan is a very beautiful island.

B. There are many shops, malls and bookstores in Taiwan.

C. The accommodation and transportation are very good in Taiwan.

D. Years of isolation between Taiwan and mainland makes it an attractive place.

67. What was the original goal of mainland tourists to Taiwan in 2009?

A. 660, 000                     B. 606, 100                      C. 600, 000                         D. 900, 000

68. The number of mainland tourists to Taiwan in 2009 was fulfilled because         .

A. the residents of 25 provinces could visit Taiwan

B. mainland tourists could stay in Taiwan for 15 days

C. the Chinese government made a string of relaxed rules

D. there were no impacts of H1N1 flu in Taiwan and mainland

69. We can infer from the text that         .

A. there may be a goal for Mainland tourists visiting Taiwan in 2010

B. Chinese mainland tourists can stay in Taiwan for a maximum of 10 days

C. the global economic downturn had not influnced Taiwan’s travel industry

D. H1N1 flu had not made the number of the mainland tourists to Taiwan drop

70. Which of the following would be the best title for the text?

A. Visitors to Taiwan will slowdown

B. Mainland tourists to Taiwan hit mark

C. More and more mainland tourists visit Taiwan

D. H1N1 and global economic influence Taiwan’s travel industry

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