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主动脉在维持舒张压中起重要作用,主要是由于主动脉 ( )

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  • 【名词&注释】

    法律监督、重要作用(an important role)、参政议政、人民政协(cppcc)、团结合作(union and cooperation)、英国政府(british government)、摩擦阻力(frictional resistance)、美国政府(american government)、北爱尔兰(northern ireland)、命中注定

  • [单选题]主动脉在维持舒张压中起重要作用,主要是由于主动脉 ( )

  • A. 管壁厚
    B. 口径大
    C. 对血流的摩擦阻力(frictional resistance)
    D. 血流速度快
    E. 管壁有可扩张性和弹性

  • 查看答案&解析 点击获取本科目所有试题
  • 举一反三:
  • [单选题]人民政协的主要职能是( )
  • A. 政治协商与法律监督
    B. 政治协商与民主监督
    C. 政治协商与合作共事
    D. 团结合作与舆论监督

  • [单选题]Passage FiveRoman soldiers in some places built long rows of signal towers. When they had a message to send, the soldiers shouted it from tower to tower. If there were enough towers and enough soldiers with loud voices, important news could be sent quickly over distance.
  • A. In Africa, people learned to send messages by beating on a series of large drums (鼓). Each drum was kept within hearing distance of the next one. The drum beats were sent out in a special way that all the drummers understood. Though the messages were simple, they could be sent at great speed for hundreds of miles.
    B. In the eighteenth century, a French engineer found a new way to send short messages. In this way, a person held a flag in each hand and the arms were moved to various positions representing different letters of the alphabet (字母表). It was like spelling out words with flags and arms.
    C. Over a long period of time, people sent messages by all these different ways. However, not until the telephone was invented in America in the nineteenth century could people send speech sounds over a great distance in just a few seconds.
    D. 51. According to this passage, the Roman way of communication depended very much on______.
    E. fine weather
    F. high tower
    G. the spelling system
    H. arm movements

  • [单选题]The passage focuses on .
  • A. why Pepperberg decided to carry out the experiment
    B. how Pepperberg proved her theory abottt animals' thoughts
    C. the new way of communication Pepperberg proposed
    D. the problems that Pepperberg faced in the experiment

  • [单选题]
  • A. complainB. weaken
    B. emphasize
    C. buy

  • [单选题]"Desperate" means ______.
  • A. in great need
    B. reckless
    C. hopeless
    D. skillful

  • [单选题]Passage Three
  • Romeo and Juliet was probably written in 1595, when Shakespeare was a young successful playwright. He had already written comedies and history plays, but had not yet developed his shill in tragedy. The power of fate is strong to Shakespeare’s play. Chance and evil eventually join to bring tragedy. Chance involves Romeo in a murder, chance prevents a message from reaching Romeo in time, chance brings about a deadly meeting in a cemetery. Many Elizabethans were followers of astrology(星相术) and believed that the stars could control events. Thus, Romeo and Juliet art referred to as” star-crossed lovers” whose stars doomed(命中注定)them to disaster. Elizabethans also had a concept of fate in the person of Dame Fortune (命运女神). By spinning her wheel, she could raise the state of a beggar or a lower that of a king. One of the fascinations of Shakespeare is the way in which he put these ideas into the play. One of the most difficult things to decide about this play is the question of responsibility. Did irresistible fate bring tragedy to Romeo and Juliet, or were they themselves to blame? The fact that this question is not resolved by the author also helps to make Shakespeare’s Romeo and Juliet a fascinating work. 44. According to Para.1, Shakespeare wrote Romeo and Juliet ____.

  • A. when he succeeded in comedy and history plays
    B. after he had developed his skill in tragedy
    C. before he wrote comedies and history plays
    D. when he was no longer young

  • [单选题]Whose idea was it to go to the opera? I suggested________
  • A. go
    B. to go
    C. that go
    D. going

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