何谓强制引水（Compulsory pilot）？

阅读理解。

     One morning a fox sees a cock in a tree. He thinks, "This is my breakfast." He comes up to the

cock and says, "My dear cock! I hear you can sing very well. Can you come down and sing for me?"

The cock is very happy. He comes down and closes his eyes and then begins to sing. The fox sees

that and catches him in his mouth quickly and carries him away.

     The people in the field see the fox. They cry "Look! Look! The fox is carrying a cock away. " The

cock says to the fox. "Mr Fox, do you understand? The people say you are carrying their cock away.

Tell them it is yours not theirs."

     The fox opens his mouth and says. "The cock is mine, not yours." Just then the cock runs away

from the fox and flies into a tree.

1. Where is the cock?

A. In the tree.  

B. On the tree.

C. In the room.

D. On the floor.

2. The fox likes ______ the cock. 

A. to talk to      

B. to know    

C. to hear the cock singing  

D. to eat

3. Which sentence is wrong?

A. The fox knows the cock.      

B. The cock closes his eyes and begins to sing. 

C. The fox catches the cock in his mouth.

D. The fox carries the cock away.

4. The fox tells the people in the field the cock is ______. 

A. theirs          

B. their        

C. his          

D. yours

5. We can think ______ is smart. 

A. the fox        

B. the cock    

C. the people    

D. the farmer

患者男性，28岁，3年前因外伤后根折而拔除，现要求修复，检查：见患者缺牙间隙小，余留前牙问有散在间隙

影响固定桥桥体挠曲变形的最主要因素是（）

A.桥体长度

B.桥体厚度

C.桥体宽度

D.力大小

E.桥体材料

    日本是太平洋中的一个岛国，每年春天是日本人赏樱的季节。当第一朵樱花在九州岛南部绽放后，媒体就开始向人们播报樱花开放的时间，据此，回答下列问题：

1、日本领土组成中的四个大岛，纬度最高的是 [ ]

A、北海道岛

B、本州岛

C、四国岛

D、九州岛

2、影响樱花开放时间自南向北逐渐推迟的主要因素是[ ]

A、水分

B、地形

C、热量

D、树种

关于对象的串行化，下列说法错误的是( )。

A．对象串行化是对Java对象的读、写的过程

B．对象串行化定制分为两个层次：部分串行化和完全串行化

C．对象串行化必须实现Serializable接口

D．对象永久化是指将对象存在内存中

马克思主义认为，国家分类的划分标准应该是______

A．掌握国家权力的人数多少
B．各种国家所具有的最本质的特点
C．本国政府对于国家主权的掌握程度
D．各国的地理环境