问题 实验题

(4分)右图是心脏及其连接的血管结构示意图,请根据图回答:

(1)心脏的四个腔中,壁最厚的是[   ]。

(2)血管[6]中流动的是      血。

(3)血液只能从[1]流向[2]、从[3]流向[4],是因为它们之间有      ,只能单方向开放。

(4)若腮腺发炎,为了消炎在上臂进行静脉注射后,药物最先到达心脏的四个腔中的        

答案

(1)[4]     (2)动脉    (3)房室瓣(瓣膜)     (4)右心房

1是右心房,2是右心室,3是左心房,4是左心室,左心室是体循环的出发点,所以壁最厚,6是与左心室相连的主动脉,里面流的是动脉血,心房和心室间有瓣膜,保证血液由心房流向心室,静脉注射的药物随着血液由上腔静脉送回到心脏的右心房。

单项选择题
阅读理解

阅读理解

     Our children and grandchildren may not have a chance to visit many of the most famous places around

the world. War, weather, age, traffic and pollution damage these famous places. Looking after these places often costs more than one country can afford.

     In the early 1970s, world governments decided that if they joined together, they would be able to

preserve our history. If every country paid some money, they said, it would be possible to look after

important historic places. Also, if they discovered that a monument needed urgent help, they would have

money for repairs. For these reasons, countries around the world united to form the World Heritage

Organization in 1972. Today, the organization helps to maintain and restore the most important places from our history.

     However, one of the biggest problems for historic places is vandalism. People sometimes enter the sites and destroy or damage the buildings. At some sites, such as Stonehenge(巨石阵) in England, governments have built high fences to protect the site from vandals.

     There are many different ideas about how to solve the problem of vandalism. Stone experts say that if

guards patrolled the sites, vandals would not be able to get in. Some experts say that if they fixed more

television cameras, they would not need so many guards. Other experts say that the best solution is

education. If people learned to respect history, they would not destroy or damage it. They would also want to spend money looking after old places. For this reason, the World Heritage Organization helps to spread information about the value of historic sites.

1. According to this passage, ____ is NOT mentioned in Paragraph 1 for the reasons why the famous

places are damaged?  

A. people's awareness            

B. pollution  

C. war and climate              

D. traffic

2. Which of the following shows us the action of vandalism?

A. Governments build high fences to protect the site from vandals

B. Guards patrolled the sites and they fixed more television cameras

C. People enter the sites and cause damage to the buildings

D. They collect as much money as they can to preserve the buildings

3. What's the best way to solve the biggest problem of preserving our history?

A. Every country spends more money looking after these places

B. To form the World Heritage Organization

C. Too many guards are needed to prevent vandals getting in

D. To make people know more about the value of historic sites