正确答案: E

管壁有可扩张性和弹性

题目：主动脉在维持舒张压中起重要作用，主要是由于主动脉 （ ）

解析：E

查看原题 点击获取本科目所有试题

举一反三的答案和解析：

[单选题]人民政协的主要职能是( )

政治协商与民主监督

解析：B【解析】本题考查政治知识，要准确记住。人民政协的主要职能是民主监督、政治协商和参政议政。

[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.

high tower

解析：

51．答案为B  从第一段可知罗马士兵通过在高塔上叫喊传递消息，因此答案为B。

[单选题]The passage focuses on .

how Pepperberg proved her theory abottt animals' thoughts

解析：文章主旨题。文章主要讨论了Pepperberg从选择Alex做试验到证明其观点的过程，因此B项符合题意。

[单选题]

emphasize

解析：挪威诺贝尔委员会还希望能强调在这一和平进程中，北爱尔兰政府的其他领袖、英国政府、爱尔兰政府，以及美国政府所取得的积极成果的重要作用。

[单选题]"Desperate" means ______.

in great need

解析：51．第一段。后面进一步解释他们急需什么样的人。选项 A是正确的。

[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 ____.

when he succeeded in comedy and history plays

[单选题]Whose idea was it to go to the opera? I suggested________

going

解析：suggest后必须接动名词。A．go是动词原形；B．to go是不定式，两者都不可以用；C．that go，that后没有主语，也不符合。