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【判断题】
SF 6 断路器的结构,按其灭弧,有双压式和单压式两类。A.
正确
B.
错误
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【简答题】表示实体类型和实体间联系的模型,称为(),最著名、最常用的概念模型是()
【单选题】In ______, the only element that can be deleted or removed is the one that was inserted most recently.
A.
a line
B.
a queue
C.
an array
D.
a stack
【单选题】听力原文： The majority of people, about nine out of ten, are fight-handed. Up until recently, people who were left-handed were considered old, and once children showed this tendency they were forced to us...
A.
They thought them strange.
B.
They considered they were funny.
C.
They thought them clever.
D.
They considered they were creative.
【多选题】5-6岁儿童学习科学的特点包括
A.
初步理解科学现象中表面的和简单的因果关系
B.
初步理解科学现象中比较内在的、隐藏的因果关系
C.
开始根据事物的表面属性、功能和情景进行概括分类
D.
能够初步根据事物的本质属性进行概括分类
【简答题】表示实体类型和实体间联系的模型,称为,最著名、最为常用的概念模型是___1__模型。
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