什么是专升本考试?专升本考试简介看这里!上海市

右心室出口周缘附着的是 （　　）

A.二尖瓣

B.三尖瓣

C.主动脉瓣

D.肺动脉瓣

E.半月瓣

阅读《郑伯克段于鄢》中的一段文字，回答下列问题：
初，郑武公娶于申，日武姜，生庄公及共叔段。庄公寤生，惊姜氏，故名日寤生，遂恶之。爱共叔段，欲立之。亟请于武公，公弗许。
（1）解释这段文字中画横线字的含义。
寤生：
亟：
（2）分析这段文字在全文结构中的作用。

It seems so natural to put up an umbrella to keep the water off when it rains.But actually the?umbrella was not invented as protection against rain.Its first use was as a shade against the sun!
Nobody knows who first invented it,but the umbrella was used in very ancient times.Probably?the first to use it were the Chinese,as early as the eleventh century B.C.
We know that the umbrella was used in ancient Egypt and Babylon as a sunshade.And there?was a strange thing connected with its use:it became a symbol of honour and authority.In the Far?East in ancient times the umbrella was allowed to be used only by royalty or by those in high office.
In Europe,the Greeks were the first to use the umbrella as a sunshade.And the umbrella was?in common use in ancient Greece.But it is believed that the first persons in Europe to use the?umbrella as protection against the rain were the ancient Romans.
During the Middle Ages,the use of the umbrella practically disappeared.Then it appeared?again in Italy in the late sixteenth century.And again it was considered a symbol of power and authority.By 1680,the umbrella appeared in France,and later on in England.
By the eighteenth century,the umbrella was used against rain throughout most of Europe.Umbrellas have not changed much in style during all this time,though they have become much lighter in weight.It wasn′t until the twentieth century that women′s umbrellas began to be made,in a whole variety of colours.

Which of the following statements is NOT true about the umbrella?

A.No one exactly knows who was the inventor of the umbrella.
B.The umbrella was first invented to be used as protection against the sun.
C.The umbrella changed much in style in the eighteenth century.
D.In Europe the Greeks were the first to use the umbrella as a sunshade.

关于杂音传导正确的说法是 （　　）

A.收缩期杂音均易传导

B.舒张期杂音均不易传导

C.伴震颤的杂音则肯定传导

D.杂音传导时，其性质不变

E.杂音的传导与病情轻重有关