可竞争市场

不是主要的医院内感染常见传播途径是

A．接触传播
B．诊疗手术传播
C．水和食物传播
D．各种制剂传播
E．虫媒传播

It was August 2nd,1927.The news had spread fast.A man named Ralph Peer was coming to the city of Bristol.He wanted to make recordings of local people singing and playing musical instruments.And he said he would pay fifty dollars for each song recorded.That was a lot of money in those days.Many people came to Bristol that day to play for Mr.Peer.But one group seemed to have just the sound that he was looking for.They were a man named A．P.Carter，his wife Sara，and her cousin Maybelle.They called themselves the Carter Family.

Their first recordings were sent to radio stations throughout the United States.Many listeners were surprised at what they heard.Instead of classical or jazz songs that radio stations usually played，a new sound was born.The Carter Family sounded different.They did not sound as if they had taken music lessons.But it did not matter.The people in poor rural areas thought they sounded just like their neighbors.

The Carters sang songs about living in the mountains of Virginia，Tennessee，and North Carolina.They sang about the love of a young man for a special girl.They sang about the beauty of nature.They sang about death and sadness.And they sang religious songs that told of the hope for a better life after death.

A．P.Carter sang in the group and also searched for new songs.He often traveled long distances to small towns in the southeastern United States.He wanted to hear the songs that local people sang in their communities.He wrote down the words but kept the music in his memory.When he returned home，he helped Sara and Maybelle fit them to the Carter Family musical style.

The Carter Family soon became famous.They recorded more songs.They traveled to many cities and towns in the eastern United States to perform.Thousands of people heard them sing and bought their recordings.Some people estimate that within three years，the Carter Family sold three hundred thousand recordings.

小题1:What does this passage mainly talk about?

A．A family born for music.

B．A family singing differently.

C．The first family of country music.

D．A family singing in a group.小题2:When Mr.Peer heard the Carter Family's songs，he most probably felt ________.

A．disappointed　

B．calm

C．confused　

D．excited小题3:Many listeners were surprised when they heard the Carter Family's singing because ________.

A．the family did not seem to be good at singing

B．what the family sang sounded uncomfortable

C．the family sang classical and jazz songs in a very different way

D．the family sang something that they had never heard before小题4:What was A．P.Carter's purpose in traveling to small towns in the southeastern United States?

A．To ask for some advice on his music.

B．To collect songs sung by the local people there.

C．To introduce his music to the local people there.

D．To see if the local people there had heard his music.

何谓“心主血脉”？

风机叶轮安装后，如何消除叶轮的显著静不平衡？

鳖甲除能滋阴清热外又能（）

A.凉血止血

B.软坚散结

C.润肠通便

D.清心安神

E.补气生津