在对某校高一学生体育选修项目的一次调查中,共调查了160人,其中女生85人,男生

题型:解答题

问题:

在对某校高一学生体育选修项目的一次调查中,共调查了160人,其中女生85人,男生75人.女生中有60人选修排球,其余的人选修篮球;男生中有20人选修排球,其余的人选修篮球.(每人必须选一项,且只能选一项)
(1)根据以上数据建立一个2×2的列联表;
(2)能否在犯错误的概率不超过0.001的前提下认为性别与体育选修项目有关?
参考公式及数据:K2=
n(ad-bc)2
(a+b)(c+d)(a+c)(b+d)
,其中n=a+b+c+d.
K2≥k00.500.400.250.150.100.050.0250.0100.0050.001
k00.4550.7081.3232.0722.7063.8415.0246.6357.87910.828
考点:独立性检验的基本思想及其初步应
题型:解答题

已知集合M={x|y=lg(2x-x2)},N={x|x2+2x-3≥0},则M∩N等于(  )

A.{x|1≤x<2}

B.{x|x≤-3或 0<x<2

C.{x|-3≤x<2}

D.{x|0<x≤1}

题型:解答题

◆200 dead as Brazilian plane crashes in Sao Paulo

Up to 200 people were dead after a passenger plane with 176 people aboard slid off the runway on landing and hit a fuel storage tank at Sao Paulo's Congonhas airport on Tuesday.

Brazilian airline TAM said that 170 passengers and 6 crew were aboard the Airbus A320 flying from Porto Alegre in southern Brazil to Sao Paulo when it lost control on landing and slid off the wet runway.

Brazilian news agency Folha reported up to 200 people were dead, including some victims on the ground.

◆_______________________________________

Two people were killed Saturday in two separate plane crashes in the United States, media reports said.

In Dayton, Ohio, a plane crashed on a runway of the Dayton International Airport while performing during the Vectren Dayton Air Show. The pilot, Jim LeRoy, was taken to Miami Valley Hospital and was announced dead. The air show was canceled .

Also on the same day, two single-engine war planes at an experimental air show collided(相撞) in Wisconsin while landing, killing one of the pilots and injuring the other.

◆All 114 aboard Kenya plane killed  

A Kenya Airways plane that crashed after takeoff in Cameroon with 114 people on board is largely submerged (淹没) in a swamp(沼泽地) and there is no chance of survivors, Cameroon 's civil protection service said on Monday  

The Boeing 737-800 had taken off from Douala and its wreckag (残骸)was found just 12 miles from the town. The plane fell head first. But the cause of the crash remained unclear.

Among the passengers were Associated Press reporter Anthony Mitchella and an executive from the South African cell phone giant MTN. Five Chinese passengers were also killed in the crash .

小题1: The Brazilian plane crash caused extra deaths mainly because______

A.it skidded off the wet runway.

B.the runway. was very short

C.it hit a fuel storage tank

D.its pilot was inexperienced小题2:The proper title for News 2 would be _________.

A.Two pilots killed in plane crashes in US

B.The tragedies of the air show

C.Who is to blame for the plane crashes?

D.Big losses can result from small things小题3:Which of the following statements is NOT TRUE as for the Kenya plane crash?

A.The plane crashed after the plane took off.

B.The cause of the crash was under examination

C.114 passengers on board were killed including an African

D.The place where the plane crashed led to many more deaths小题4:The Brazilian plane crash killed about _____people in all on the ground.

A.170

B.30

C.24

D.6小题5:It can be inferred from the three news that_________

A.when the Airbus A320 landed, it was likely to be raining heavily

B.during the Vectren Dayton Air Show , the pilot, Jim LeRoy died on the scene

C.The place where the Boeing 737-800 crashed was just 12 miles from the town

D.Five Chinese passengers were victims of the Kenya plane crash

题型:解答题

8个月男婴,阵发性啼哭、呕吐样,烦躁不安48小时,36小时前排鲜红色便30ml后未再解大便。查体:体温39℃,脉搏130次/分,右中上腹部压痛、反跳痛、肌紧张,可扪及4cm×2cm大小肿物。其治疗方案应是()

A.剖腹探查

B.胃肠减压,胃管注入植物油60ml

C.胃肠减压,氧气驱虫

D.盐水灌肠,注射解痉药物

E.空气灌肠复位

题型:解答题

预防哺乳期乳腺炎,不包括()

A.经常清洗 * *

B.预防性应用抗生素

C.积极哺乳,避免淤乳

D.保护 * * 皮肤,避免皮肤破损

E.纠正 * * 内陷

题型:解答题

在杜邦分析体系中假设其他情况相同,下列说法中错误的是( )。

A.权益乘数大则财务风险大

B.权益乘数大则权益净利率大

C.权益乘数等于资产权益率的倒数

D.权益乘数大则资产净利率大

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