About twice every century, one of the
massive stars in our galaxy blows itself apart in a supernova explosion that
sends massive quantities of radiation and matter into space and generates shock
waves that sweep through the arms (a narrow extension of a larger area, mass, or
group) of the galaxy. The shock waves heat the interstellar gas, evaporate small
clouds, and compress larger ones to the point at which they collapse under their
own gravity to form new stars. The general picture that has been developed for
the supernova explosion and its aftermath goes something like this. Throughout
its evolution, a star is much like a leaky balloon. It keeps its equilibrium
figure through a balance of internal pressure against the tendency to collapse
under its own weight. The pressure is generated by nuclear reactions in the core
of the star which must continually su A. The Origins and Effects of Supernovas. B. The Life and Death of Stars. C. The Origins and Evolution of Life on the Earth. D. The Aftermath of a Supernova.
[单项选择]
About one million tourists go to
Barcelona every year, just to visit the Gaudi’s Church. This unusual church has
a strange history. Gaudi was born in Spain in 1852. He had to work and study at
the same time. He often missed classes because he had to work, but one day he
designed a very unusual show-case for an exhibition in Paris. People began to
give him work. He designed houses, offices and gardens. They were all very
unusual. He was soon rich and famous. Then a rich bookseller said, "Will you
build a church for the poor people of Barcelona I will pay. I will build
schools and workshops, too. They will help the people." "I will do it," said
Guadi. He worked for forty years, but he could not finish the church. It was too
big. He needed $10, 000, 000. He gave all his money to the church. He was poor
again when he died in 1926, and only the front A. Barcelona--A Famous City B. Strange History of Unusual Church C. A Poor Architect’s Study D. Gandi’s Life in His Childhood
[单项选择]About one million tourists go to Barcelona every year, just to visit the Gaudi’s Church. This unusual church has a strange history. Gandi was born in Spain in 1852. He had to work and study at the same time. He often missed classes because he bad to work, but one day he designed a very unusual show-case for an exhibition in Paris. People began to give him work. He designed houses, offices and gardens. They were all very uhusual. He was soon rich and famous. Then a rich bookseller said, "Will you build a church for the poor people of Barcelona I will pay. I will build schools and workshops, too. They will help the people." "I will do it," said Guadi. He worked for forty years, but he could not finish the church. It was ton big. He needed $10, 000, 000. He gave all his money to the church. He was poor again when he died in 1926, and only the front part of the church was finished. Now, architects, engineers and tourists from all over the world like to come and see the church, which is ver A. Bareelona--A Famous City B. Strange History of Unusual Church C. A Poor Architect’s Study D. Gaudi’s Life in His Childhood
购买搜题卡查看答案
[会员特权] 开通VIP, 查看 全部题目答案
[会员特权] 享免全部广告特权
请选择支付方式
-
微信支付
-
支付宝支付
立即支付
系统将自动为您注册账号
请使用微信扫码支付
截图扫码使用小程序[完全免费查看答案]
请不要关闭本页面,支付完成后请点击【支付完成】按钮
恭喜您,购买搜题卡成功
重要提示:请拍照或截图保存账号密码!
我要搜题网官网:https://www.woyaosouti.com
我已记住账号密码
| |