单选题1. class Animal ｛ Animal getOne（） ｛ return new Animal（）； ｝ ｝  2. class Dog extends Animal ｛  3. // insert code here   4. ｝  5.  6. class AnimalTest ｛  7. public static void main（String [] args） ｛  8. Animal [] animal ＝ ｛ new Animal（）， new Dog（） ｝ ；  9.

Text 2 To paraphrase 18th-century statesman Edmund Burke,“all that is needed for the triumph of a misguided cause is that good people do nothing.”One such cause now seeks to end biomedical research because of the theory that animals have rights ruling out their use in research. Scientists need to respond forcefully to animal rights advocates, whose arguments are confusing the public and thereby threatening advances in health knowledge and care. Leaders of the animal rights movement target biomedical research because it depends on public funding, and few people understand the process of health care research. Hearing allegations of cruelty to animals in research settings, many are perplexed that anyone would deliberately harm an animal. For example, a grandmotherly woman staffing an animal rights booth at a recent street fair was distributing a brochure that encouraged readers not to use anything that opposed immunizations, she wanted to know if vaccines come from animal research. When assured that they do, she replied,“Then I would have to say yes.”Asked what will happen when epidemics return, she said,“Don’t worry, scientists will find some way of using computers.”Such well-meaning people just don's understand. Scientists must communicate their message to the public in a compassionate, understandable way-in human terms, not in the language of molecular biology. We need to make clear the connection between animal research and a grandmother's hip replacement, a father's bypass operation a baby's vaccinations, and even a pet's shots. To those who are unaware that animal research was needed to produce these treatments, as well as new treatments and vaccines, animal research seems wasteful at best and cruel at worst.Much can be done. Scientists could“adopt”middle school classes and present their own research. They should be quick to respond to letters to the editor, lest animal rights misinformation go unchallenged and acquire a deceptive appearance of truth. Research institutions could be opened to tours, to show that laboratory animals receive humane care. Finally, because the ultimate stakeholders are patients, the health research community should actively recruit to its cause not only well-known personalities such as Stephen Cooper, who has made courageous statements about the value of animal research, but all who receive medical treatment. If good people do nothing there is a real possibility that an uninformed citizenry will extinguish the precious embers of medical progress.

第46题：The author begins his article with Edmund Burke\'s words to

A. call on scientists to take some actions.

B. criticize the misguided cause of animal rights.

C. warn of the doom of biomedical research.

D. show the triumph of the animal rights movement.

（ 12 ）有如下程序：

#include <iostream>

using namespace std

class Animal{

public:

virtual char* getType （） const { return "Animal" ； }

virtual char* getVoice （） const { return "Voice" ； }

};

Class Dog : public Animal {

public:

char* getType （ ） const {return "Dog" ； }

char* getVoice （ ） const {return "Woof"}

};

void type （ Animal& a ） {cout<<a.getType （ ） ； }

void speak （ Animal a ） {cout<<a.getVoice （ ） ； }

int main （ ） {

Dog d; type （ d ） ； cout<<" speak" ； speak （ d ） ； cout<<endi;

return 0;

}

运行时的输出结果是【 12 】 。

有如下程序：

include＜iostream＞

using namespaee std；c lass Animal{

public：

virtual char*getType( )const{return"Animal"；}

virtual char*getVoice( )const{return"Voice"；}

}；

class Dog：public Animal{

public：

char*getType( )const{return"Dog"；}

char*getVoice( )eonst{return"Woof"；}

}；

void type(Animal&A) {cout＜＜a．getType( )；}

void speak(Animal A) {eout＜＜a．getVoice( )；}

int main( ){

Dog d；type(D) ；cout＜＜"speak"；speak(D) ；cout< return 0；

}

程序的输出结果是______。

有如下程序：

nclude<iostream>

using namespace std；

class Animal{

public：

virtual char*getType()const{return“Animal”；}

virtual char*getVoice()const{return“Voice”；}

}；

class Dog：public Animal{

public：

char*getType()const{rgturn“Dog”；}

char*getVoice()const{retum“Woof”；}

}；

void type(Animal&A){cout<<a．getType()；}

void speak(AnimalA){cout<<a．getVoice()；}

int main(){

Dog d．type(D)；tout<<“speak”；speak(D)；cout<<endl；

return 0；

}

运行时的输出结果是【 】

classAnimal{AnimalgetOne（）{returnnewAnimal（）；}}classDogextendsAnimal{//insertcodehere}classAnimalTest{publicstaticvoidmain（String[]args）{Animal[]animal={newAnimal（），newDog（）}；for（Animala：animal）{Animalx=a.getOne（）；}}}和代码：3a.DoggetOne（）{returnnewDog（）；}3b.AnimalgetOne（）{returnnewDog（）；}第3行中插入的哪项编译且运行无异常？

A.3a行或3b行

B.既非3a，也非3b

C.3a行

D.3b行

From the text we learn that Stephen Cooper is

A. a well-known humanist.

B. a medical practitioner.

C. an enthusiast in animal rights.

D. a supporter of animal research.

It can be inferred from the passage that all of the following are ways of producing new strains of influenza viruses EXCEPT______.

A. two influenza viruses in the same animal recombining

B. animal viruses recombining with human viruses

C. two animal viruses recombining in one animal

D. two animal viruses recombining in a human

下列程序片段中，能通过编译的是

A．public abstract class Animal{ public void speak()；}

B．public abstract class Animal{ public void speak(){}}

C．public class Animal{ public abstract void speak()；}

D．public abstract class Animal{ public abstract void speak(){}}

1.classAnimal｛AnimalgetOne（）｛returnnewAnimal（）；｝｝2.classDogextendsAnimal｛3.//insertcodehere4.｝5.6.classAnimalTest｛7.publicstaticvoidmain（String[]args）｛8.Animal[]animal＝｛newAnimal（），newDog（）｝；9.for（Animala：animal）｛10.Animalx＝a.getOne（）；11.｝12.｝13.｝和代码：3a.DoggetOne（）｛returnnewDog（）；｝3b.AnimalgetOne（）｛returnnewDog（）；｝第3行中插入的哪项将编译且运行无异常？（）

A.3a行

B.3b行

C.3a行或3b行

D.既非3a，也非3b

下列程序片段中，能通过编译的是（ ）。

A.public abstract class Animal{ public void speak；}

B.public abstract class Animal{ public void speak{)；}

C.public class Animal{ pubilc abstract void speak；}

D.public abstract class Animal{ pubile abstract void speak{}；}