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We lived in a very quiet neighborhood. One evening I heard a loud crash in the street. Earlier that evening my wife had asked me to go to the store to get some soft drinks. It seemed like this would be a good time to let my teenage daughter Holly practice her driving, so I sent her to the store in my truck. At dinner my son talked about how much he liked my truck. I enjoyed having it, but I said: 'Guy, my heart is not set on that truck. I like it but it is just metal and won’t last forever. Never set your heart on anything that won’t last.' After hearing the loud noise, the whole family ran outside. My son shouted: 'Dad! Dad, Holly crashed your truck.' My heart sank and my mind was flooded with conflicting thoughts. Was anyone hurt? Who else was involved? As I ran to the door, I heard a voice in my heart say: 'Here is a chance to show Holly what you really love. She’ll never forget it.' The accident had occurred in my own driveway. Holly had crashed my truck into our other vehicle, the family van (搬运车). In her inexperience, she had confused the brakes and the gas pedal. Holly was unhurt physically, but when I reached her, she was crying and saying: 'Oh, Dad, I’m sorry. I know how much you love this truck.' I held her in my arms as she cried. Later that week a friend stopped by and asked what had happened to my truck. I told her the whole story. Her eyes moistened (湿润) and she said: 'That happened to me when I was a girl. I borrowed my dad’s car and ran into a log that had fallen across the road. I ruined the car. When I got home my Dad knocked me to the ground and began to kick me.' Over 40 years later, she still felt the pain of that night. I remember how sad Holly was and how I comforted her. One day, when Holly thinks back on her life, I want her to know what really matters in my life. 小题1:How did the crash happen? A.The van was parked in the wrong place that evening. B.Holly stepped on the gas pedal instead of the brakes. C.The brakes of the truck didn’t work properly. D.Holly was too careless and young to drive a truck. 小题2:Why didn’t the writer punish Holly? A.He was so rich that he didn’t care about losing one truck. B.He thought there was no point punishing her after the accident. C.He believed the truck was made of metal and of poor quality. D.He wanted Holly to know he loved her more than any possessions. 小题3:What does the underlined sentence mean? A.She still suffered physical pain. B.She felt guilty of damaging the car. C.It left a deep wound on her soul. D.She was not forgiven by her Dad. 小题4:Which of the following would be the best title for the passage? A.What really matters? B.Better to forgive and forget C.Who is to blame? D.Accidents will happen
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【判断题】市场在资源配置中起决定性作用的经济体制是计划经济。( )
A.
正确
B.
错误
【单选题】下列关于E-R模型的叙述中,说法不正确的是( )。
A.
在E-R图中,实体类型用矩形表示,属性用椭圆形表示,联系类型用菱形表示
B.
实体类型之间的联系通常可以分为1:1、1:n和m:n三类
C.
1:1联系是1:n联系的特例,1:n联系是m:n联系的特例
D.
联系只能存在于两个实体类型之间
【单选题】第十二届昌平区苹果文化节上,市民们见到树体矮小、幼童伸手可摘的苹果树。“矮化密植”技术使果树树冠缩小,结果更早、更多、含糖量更高。据此回答下面两题。 与传统种植方式相比,“矮化密植”技术( ) 1充分利用了光热条件 2提高了土壤肥力 3降低了科技投入 4改良了作物品种
A.
①③
B.
①④
C.
②③
D.
②④
【多选题】e-r模型说法正确的是
A.
E-R模型用矩形表示实体
B.
E-R模型用椭圆表示属性
C.
E-R模型用菱形表示联系
D.
E-R模型用平行四边形表示关键字
【多选题】E-R 模型说法正确的是
A.
E-R 模型用矩形表示实体
B.
E-R 模型用平行四边形表示关键字
C.
E-R 模型用椭圆表示属性
D.
E-R 模型用菱形表示联系
【简答题】第十二届昌平区苹果文化节上,市民们见到树体矮小、幼童伸手可摘的苹果树。“矮化密植”技术使果树树冠缩小,结果更早、更多、含糖量更高。据此回答下面两题。
【单选题】下列关于E-R模型的说法中,正确的是( )
A.
依赖于计算机硬件和DBMS
B.
独立于计算机硬件,依赖于DBMS
C.
独立于计算机硬件和DBMS
D.
依赖于计算机硬件,独立于DBMS
【多选题】下列关于技术推动创新过程模型说法正确的是 。
A.
在技术推动的创新过程模型中,消费者需求是企业从事科技研发所渴望的成果
B.
研究开发是创新构思的主要来源
C.
科技推动的创新是一种非线性关系
D.
技术推动的创新过程模型主要是在20世纪70年代到80年代发展
E.
这种模型下,市场被动地接受研究开发成果
【多选题】关于数据模型的说法正确的是( )。
A.
根据模型应用目的不同,可以将其划分为概念模型和结构数据模型
B.
概念模型是从计算机的角度对现实数据的抽象
C.
结构数据模型是按用户的观点对现实数据的抽象
D.
概念模型的表示方法较多,其中最常用的是实体-联系(E-R)方法
【单选题】第十二届昌平区苹果文化节上,市民们见到树体矮小、幼童伸手可摘的苹果树。“矮化密植”技术使果树树冠缩小,结果更早、更多、含糖量更高。据此回答1~2题。 1. 与传统种植方式相比,“矮化密植”技术 1充分利用了光热条件2提高了土壤肥力3降低了科技投入4改良了作物品种
A.
①③
B.
①④
C.
②③
D.
②④
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