问题 单项选择题 A1/A2型题

在行心脏黏液瘤摘除术时,不恰当的做法是()

A.应明确肿瘤的部位

B.应在体外循环下切除

C.应用手指探查肿瘤的部位

D.分离肿瘤时要避免损伤瘤体

E.应彻底将瘤体连同蒂部附着的房间隔组织一并切除

答案

参考答案:C

解析:心脏黏液瘤一旦确诊应尽早手术,以免引起血流紊乱或肿瘤破碎栓塞。摘除术应在体外循环下施行,注意避免搬动心脏,也不要挤捏心脏或用手指探查,以免瘤体脱落造成栓塞。

阅读理解

阅读理解。
Directions: Read the following text and choose the most suitable heading from A-F for each paragraph.
There is one extra heading, which you do not need.

A. Tuvaluan people became rich overnight
B. Signs of sinking have appeared on Tuvaiu
C. The news came that the country would be drowned
D. Tuvaluan people have suffered from serious diseases
E. Desire to enjoy life has caused serious consequences
F. Tuvaluan people are improving their living standards despite the rising sea

1. ( )
     If you suddenly received a lot of money, how would you spend it? For the people of Tuvalu, a tiny state
comprising nine islands in the South Pacific, something unusual happened. In 1999 Tuvalu, with its population
of 11,000,was the third poorest state in the world. Later, Tuvalu received a domain name on the Internet-the
letters ".tv". A communication company from California quickly offered to buy the domain name for $ 40
million. The islanders became very rich.
2. ( )
     At the same time the islanders received some very bad news. Due to global warming, and because the
islands are only 3m above sea level, Tuvalu will probably become the first state in the world to disappear
under the sea. According to scientific estimates, the islands will suffer severe floods within the next 15-20
years, and by the end of the century, the islands will have disappeared from sight altogether.
3. ( )
     You can already see signs of the rising sea on Tuvalu. Pools of seawater appear here and there, some
beaches are swallowed by the waves, and the roots of trees are rotting by the ocean. The rains cause
temporary floods.
4. ( ) 
     But despite these problems, the Tuvaluan had their new money. Paul Lindsay, a documentary film-maker,
went all the way to Tuvalu, and came back with an incredible story. As the water rises, the Tuvaluan are using
the money to develop the land that is soon to disappear. They are building new houses, planning nightclubs,
restaurants and hotels, and new cars are driving around on new roads."Just because we are sinking, it doesn't
mean we don't want to raise our standards of living." Lindsay was told by Sam Teo, Tuvalu' s minister for
natural resources. 
5. ( )
     Of the $ 40 million Tuvalu received through the Internet deal, $ 10 million was used to asphalt the islands'
L9km of roads. Before 1999 there were four cars on the islands. The Tuvaluan used to walk or cycle
everywhere. There was a flood of imported foods and goods and soon these had unexpected consequences.
The Tuvaluan people now suffer from diseases such as obesity, high blood pressure and diabetes. Others
discovered that it was too expensive for them to keep their cars. There is now a huge rubbish dump in the
 middle of this tropical paradise, covered with abandoned cars and other waste.

填空题

阅读以下说明和Java代码,将应填入 (n) 处的字句写在对应栏内。

[说明]

在一些大型系统中,大多数的功能在初始化时要花费很多时间,如果在启动的时候,所有功能(连不用的功能)都要全面初始化的话,会连带影响到应用软件要花很多时间才能启动。因此常将程序设计成到了实际要使用某种功能的阶段才初始化该功能。

以下示例展示了Proxy(代理)模式,PrinterProxy类执行一些比较“轻”的方法——设置名称和取得名称,需要真正执行“重”的方法——真正打印——时才初始Print类。图6-1显示了各个类间的关系。

[图6-1]

[Java代码]

//Printable.Java

publiC (1) Printable{

public abstract void setPrinterName(String name);

public abstract String getprinterName();

public abstract void print(String string);

}

//Printer.Java

public class Printer implements Printable{

private String name;

public Printer(){

System.out.println("正在产生Printer的对象实例");

}

public Printer(String name){

this.name=name;

heavyJob("正在产生Printer的对象实例("+name+")");

public void setPrinterName(String name){

this.name=name;

public String getPrinterName(){

return name;

public void print(String string){

System.out.println("===" +name+" ====");

System.out.println(string);

}

}

//PrinterProxy.Java

public class PrinterProxy (2) Printable{

private String name;

private Printer real;

public PrinterProxy(){}

public PrinterProxy(String name){

this.name=name;

}

public gynchronized void setPrinterName(String name){

if( (3) ){

real.setPrinterName(name);

}

this.name=name;

}

public String getprinterName(){

return name;

}

public void print(String string){

(4)

real.print(string);

}

private synchronized void realize(){//产生真正的Printer对象

if(real==null){

real= (5)

}

}

}

(1)处填()。