下列命题中,属于假命题的是[ ] A.若a-b=0,则a=b=0 B.若a-b>

题型:选择题

问题:

下列命题中,属于假命题的是[ ]

A.若a-b=0,则a=b=0              

B.若a-b>0,则a>b

C.若a-b<0,则a<b              

D.若a-b≠0,则a≠b

考点:命题,定理
题型:选择题

若四边形的两条对角线相等,则顺次连接该四边形各边中点所得的四边形是[ ]

A.梯形      

B. 矩形      

C. 菱形      

D. 正方形

题型:选择题

在“研究平抛物体的运动”的实验中,要将斜槽的末端切线调成______;将木板校准到______方向,并使木板平面与小球下落的竖直平面平行;让小球每次必须从斜面上______由静止开始释放;在白纸上记录______,作为小球做平抛运动的起点和所建坐标系的原点.

题型:选择题

阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。

A

UNICEF reports that 40 million children below the age of 15 suffer from abuse(虐待) and neglect. The USA National Committee to Prevent Child Abuse finds 3 million new reports of child abuse or neglect every year.

According to such information on human rights abuses of children, the United Nations declared 2010 as the International Year of Youth. In answer to the common human rights abuses of young people, Dr. Mary Shuttleworth of Youth for Human Rights International(YHRI) recently completed her seventh annual World Tour to five continents in eighty days. The purpose of the tour is to promote the United Nations Universal Declaration of Human Rights to tens of thousands of children and officials.

According to UNICEF, 1.2 million children are illegally traded all over the world every year.

Sold as goods, these children are forced into inhuman labor, denied basic education and robbed of their childhoods. Youth who do not know their rights are easily cheated by ill-intentioned men. That is why YHRI thinks highly of education.

“When the United Nations declared 2010 as the International Year of Youth, I knew that their human rights had to be greater than ever,” Dr. Shuttleworth said. The tour reached Mexico, Guatemala, Panama, Ecuador, Brazil, South Africa, Swaziland, Portugal, Sardinia, Sicily, Italy, Greece, Taiwan, Japan, Hawaii and Los Angeles.

The YHRI World Tour 2010 has reached tens of thousands of students as well as officials, educators, and religious leaders and thus promotes human rights education to millions more.

小题1: 2010 was declared as the International Year of Youth because ______.

A.3 million children reported their information to the UN

B.many children are suffering from ill-treatment and neglect

C.children are illegally traded throughout the whole world

D.human rights abuses of young people have been avoided小题2:According to para. 2, Dr. Shuttleworth first started her annual World Tour in _____.

A.2000

B.2004

C.2008

D.2010小题3:Youth for Human Rights International is paying attention to education because _______.

A.education should serve most children

B.too many children are forced to leave school

C.children who know their rights will make more money

D.children who know little about their rights are easily cheated小题4:According to the passage, the YHRI World Tour 2010 _______.

A.has almost stopped the child abuse

B.has reached different areas and people

C.has found more forced child labor

D.was neglected by some political leaders

题型:选择题

2011年6月6日,中国姑娘李娜赢得了法网比赛冠军,为中国争了光。请问当李娜发球将球竖直上抛到最高点时,此时球处于       (平衡状态/非平衡状态),球在网拍的重击下飞了出去,说明力可以改变            ,球最终落向地面是因为             

题型:选择题

寒邪内阻腹痛的治法是()

A.温中补虚

B.缓急止痛

C.温里散寒

D.理气止痛

E.益气健脾

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