牙轮钻机是如何实现行走？如何实现前进、后退、转弯？

Some people see a hero _____小题1:_____ someone they look up to. Some people think a hero is someone who achieves his or her goals and dreams. To me, a hero is someone who _____小题2:_____ many of life’s obstacles, who is determined and never gives up, even in the hardest of times. A hero is someone who works hard to succeed, who faces difficulties alone and becomes a successful person.

My hero is my grandmother. Her life was not always easy. World War II started _____小题3:_____ she was little. My grandma lived during the Holocaust.

Her father died when she was five years old, and she lived in the ghetto with her mother and brother. She survived on bread crumbs and apple skins, _____小题4:_____(eat) anything she could find, sometimes even picking up discarded food.

She faced hunger, thirst, illness, and freezing temperatures. _____小题5:_____ times were extremely difficult, my grandma never lost hope. She was determined to make it _____小题6:_____ the hard times and stay alive. She never gave up, overcoming every struggle and obstacle in her life one by one.

My grandma has influenced me _____小题7:_____. She has taught me that I need to work hard in order to succeed. She has helped me understand that I can do anything I set my mind to, as _____小题8:_____ as I never give up, even when something seems difficult or impossible.

My grandmother _____小题9:_____ (make) me a determined and hardworking person. She has inspired me to chase my ____小题10:_⑩_____, no matter what. For that, she is my hero.

根据使用要求和环境的不同，喷水灭火系统可分为（）。

A.自动喷水湿式灭火系统

B.自动喷水干式灭火系统

C.重复启闭预作用灭火系统

D.水喷雾灭火系统

由国际标准化组织和国际电信联盟共同提出的开放系统互连参考模型中共有 (1) 层，通信子网覆盖其中的 (2) 层，参考模型的最高层则为 (3) 层。对等层之间的通信必须遵循共同的协议，例如EIA-RS232C和HDLC就分别是一种 (4) 层和 (5) 层的协议。

中共十五大报告指出国有经济的主导作用主要体现在控制力上。

阅读以下说明，请回答问题1至问题4，将解答或相应的编号填入答题纸的对应栏内。【说明】某系统集成企业最近与某法院信息中心签订了一个法院综合信息系统运维项目合同，并签订了服务级别协议，对服务内容和具体要求进行了约定。协议中要求运维项目从解决问题过程到控制问题过程及发布过程要与法院服务管理流程很好的衔接，并建立服务台。而法院信息中心对系统的运维管理非常重视，于2010年10月通过了ISO20000的认证。该系统集成企业的小张被任命为该运维项目的项目经理。小张如何运用学到的项目管理和IT服务管理方面的知识做好流程梳理和队伍建设对管理好该项目至关重要。

服务台就是热线电话。