题目

如图所示，质量相等、底面积不同的圆柱形容器A和B里盛有质量相等的甲、乙两种水和酒精，且两液面相平，两容器都装满液体。当两个完全相同的小球分别放在A、B两个容器中，已知小球密度大于酒精密度，但小于水的密度，则液体对各自容器底部的压强pA、pB和容器对地面的压力FA、FB的关系是（    ） A．pA＜pB，FA＝FB         B．pA＜pB，FA＞FB         C．pA＞pB，FA＝FB       D．pA＞pB，FA＜FB                                     Country music is one of the most popular kinds of music in the United States today because it is about simple but strong human feelings and events—love, sadness, good times, and bad times. It tells reallife stories and sounds the way people really talk, as life becomes more complicated(复杂的)it is good to hear music about ordinary people.Country music, sometimes called country western, comes from two lands of music. One is the traditional music of the people in the Appalachian Mountains in the eastern United States. The other is traditional cowboy music from the West. The singers usually play guitars, and in the 1920s they started using electric guitars.At first city people said country music was low class. It was popular mostly in the South. But during World War II, thousands of Southerners went to the Northeast and Midwest to work in the factories. They took their music with them. Soldiers from the rest of the country went to army camps in the South. They learned country music. Slowly it became popular all over the country.Today country music is also popular everywhere in the United States and Canada—in small towns and in New York City, among black and white, and among educated and uneducated people. About 1,200 radio stations broadcast country music twenty four hours a day. English stars sing it in British and people in other countries sing it in their own languages. The music that started with cowboys and poor Southerners is now popular all over the world.1.From the passage, we know that country music comes from________.A.the Northeast and Midwest B.real-life stories in small townsC.factories and army camps in the South. D.the Appalachian Mountains and the West2.Before World War II, country music was popular mainly in________.A.the South B.the North C.the Midwest D.the Northeast3.During World War II, many Southerners went to the Northeast and the Midwest to ________.A.study country music there B.work in the factory thereC.make country music popular D.teach local people country music4.Country music is very popular in the USA today because________.A.city people said it was low class B.it started with cowboys and poor SouthernersC.people could sing it in different languages D.it is about human feelings and loved by different people5.The passage mainly introduce the ____of country music?A.rhyme B.histroy C.beauty D.style