若a>3,则方程x3-ax2+1=0在(0,2)上恰有[ ] A.0个根 B.1

题型:选择题

问题:

若a>3,则方程x3-ax2+1=0在(0,2)上恰有[ ]

A.0个根

B.1个根

C.2个根

D.3个根

考点:函数的零点与方程根的联系
题型:选择题

— ______do millions of online users visit the home page of the government for?

— To read the news and search for the information they need.

A.When

B.Where

C.Why

D.What

题型:选择题

在海运提单的收货人栏内有"ORDER"字样的提单称之为______。

A.记名提单

B.不记名提单

C.指示提单

D.直运提单

题型:选择题

在未划分中心线和机动车道与非机动车道的道路上,机动车在道路右边行驶。

题型:选择题

As the old saying goes, beauty is in the eye of the beholder. But Venezuela, whose beauty queens have won Miss Universe and Miss World over six times, doesn’t leave it to chance. In Venezuela, girls as young as four can be found attending beauty schools, where they can learn a range of skills from how to walk to the correct way to hold a wine glass.

“Hair must always be completely clean, make-up should look natural, and you should always, always wear high-heels,” advises Andrea Reyes, a teacher in a school of Caracas with 160 students.

Beauty contests are treated in Venezuela much as sporting competitions are elsewhere. Many Venezuelan parents believe that if their daughters can succeed and get the beauty crown, their future as famous and public persons is sure to come. As a result, the girls are trained to compete at a young age.

Among former beauty queens are Irene Saez, who went on to compete for the country’s president, and Eva Ekvall, whose battle with cancer helped to make more people know about the illness in Venezuela.

However, voices against the trend can be heard all over the country. At one time, a feminist (男女平等主义者) group tried to stop the Miss Venezuela broadcast. President Hugo Chavez has spoken out against the culture of plastic surgery(整形手术)in Venezuela, calling it a “frightening thing”.

The BBC reporter Sarah Grainger says that acceptance of the contests is partly a result of the country’s “machista” (大男子主义的) view of the different roles that men and women should play, “Men are supposed to be strong and brave and women to be gentle and beautiful”.

Miss Universe 1996, Alicia Machado, knows the price to be paid when you’re no longer seen as attractive. After winning the beauty contest, she said all she wanted to do was “eat, eat and eat”. Her weight gain later and warning by the organizers of the contest to replace her as queen with the runner-up was among the hottest topics in the country, especially in Latin America.

小题1:What’s the advice given by a teacher in Caracas to her students?

A.Attending beauty schools as early as possible.

B.Wearing high-heels at times.

C.Washing your hair quite often.

D.Fighting against cancer bravely.小题2:Girls try to win in the beauty contest to__________.

A.try plastic surgery

B.practice the country’s “machista” view

C.earn a good future

D.eat as much as one pleases小题3:We can learn from the passage that__________.

A.Venezuela girls have won Miss Universe and Miss World over six times by chance

B.In Venezuela, people judge men and women in quite different ways

C.Eva Ekvall once competed for the country’s president

D.Venezuelan president Hugo Chavez has spoken out against beauty contests小题4:What does the underlined word “runner-up” in the last paragraph mean?

A.the news reporter covering the beauty contest

B.the organizer of the beauty contest

C.the girl who is slim

D.the person who comes in the second place

题型:选择题
如图所示,AB是一质量为m的均匀细直杆,A端靠在光滑的竖直墙壁上,B端置于水平地面上,杆身与竖直方向夹角为θ,杆与地面的摩擦系数为μ,保持平衡,则此时杆与地面的摩擦力为(  )

A.mgtgθ

B.mgsinθ

C.μmg

D.μmg

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