题干

小李同学静静地站在水平地面上,思考如何能减小自己对地面的压强.以下状态中,他对地面的压强最小的是(  )

A:走动时

B:抬起一只脚

C:坐在地面上

D:平躺在地面上

上一题 下一题 0.0难度 选择题 更新时间:2020-02-06 03:18:29

答案(点此获取答案解析)

D

同类题1

阅读理解

    Tang Dynasty poets sang for about three centuries in different tones. There were many famous poets living in the Tang period such as Li Bai, Du Fu, Bai Juyi and Li Shangyin. Poems of the Tang Dynasty edited in the Qing Dynasty is a collection of about 48,900 poems that were written by over 2,200 poets. But it didn't cover all the poems of the Tang Dynasty.

    During the Tang Dynasty, poems were recited when lovers walked under the moonlight. Poems were also recited when soldiers fought on the battlefield. People recited them in the open air or at temple fairs.

    In the Tang Dynasty scholars had to be poets. Their readers were not only people of high social position but also common people. Poets recited poems; women singers sang poems and other ranks of people, including old women and children, read Tang poems. This atmosphere affected foreigners who visited the country at that time. As a result, Tang poetry was introduced to some adjacent countries, like Japan and Vietnam.

    Tang poetry is a most brilliant page in the history of ancient Chinese literature. It's a miracle in the cultural history of mankind. The Tang Dynasty was a powerful empire with a vast territory. It inherited Chinese civilization that went back to ancient times, and was combined with the best of other cultures and adopted the benefits of other nations in the world. Tang poetry wasn't the only spiritual wealth created by the Tang Dynasty people. Philosophy and religion, handwriting and painting and music and dance all gained new peaks of development. Tang poetry, however, was the jewel in the crown and its greatest achievement.

同类题3

    Do you know more and more Chinese artists have made regular donations to charity or put their efforts into charity work in China? Here let's know some of them.

Faye Wong and her husband Li Yapeng started the Yan Ran Angel Foundation for harelipped(兔唇的) children three years ago. It was named after their daughter. Its purpose is to help children under 14 to cure their harelips. The couple donated one million yuan (about $ 133,000) to start the organization.
Cong Fei was born in a poor family. He became a successful singer in Shenzhen. He helped 178 poor students and disabled people for more than 10 years. Before he died of an illness at the age of 37 in 2006, he decided to donate his cornea(角膜) to people with eye diseases. He helped six people see the world.
Guan Mucun has donated money to Project Hope to help poor students finish primary education. Thirty of these poor students have already finished high school with her support. Guan has also helped with charity work for environment protection, HIV/AIDS prevention, blood donation and “Mother Water”.
Guan had an unlucky childhood: her mother died when she was only 10. years old. With the help of the government and her neighbors, she grew up and was successful as a famous singer.
Action star Jackie Chan is a wholehearted supporter of charities including UNICEF, Operation Smile and his own Jackie Chan Charitable Foundation. In 2007, he used much of his spare time to visit the farthest parts of China on his Dragon's Heart Charity Missions.The Dragon's Heart Foundation aims to meet the needs of poor children and the elderly in the hardest-to-reach areas of the country. Chan has made several trips to these poor villages, bringing warm clothing, wheelchairs and school supplies, and helping to build schools.