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【单选题】
一个关系模式r的每一个非主属性,既不传递依赖于码,也不部分依赖于码,则这个关系模式r可以达到第几范式:
A.
1NF
B.
2NF
C.
3NF
D.
4NF
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【单选题】You can take the person out of nature, but you can't take nature out of the person. The latest scientific thinking tells us that even in the modem workplace, we're still at the mercy of basic biology....
A.
you can change a person's nature for a while, but you can't change it permanently
B.
you can change man's living conditions, but you can't change his nature
C.
you can follow biological roles but you can't break them
D.
you can improve yourself but you can't change your nature
【单选题】Dave says people say you can hear "La Llorona" when there is a _______________.
A.
strong wind
B.
no wind
【简答题】在经济全球化条件下为什么要发扬爱国主义精神?
【简答题】在经济全球化条件下,为什么要发扬爱国主义精神?
【单选题】Dave says people say you can hear “La Liorona ” when there is ___________ wind.
A.
a strong
B.
no
【判断题】结构元素的两个属性是位置和大小。
A.
正确
B.
错误
【单选题】Dave says people say you can hear "La Llorona" when there is __________ wind.
A.
a strong
B.
no
【判断题】结构元素的两个属性是位置和大小。
A.
正确
B.
错误
【单选题】u3 unit test reading ONE 4. If you want to stop at LA, you can take flight ___ .
A.
UA802
B.
UA800
C.
CA901
D.
CA905
【简答题】A~E是原子序数依次增大的五种短周期元素,其有关性质或结构信息如表所示: 元素 A B C D E 有关性质或结构信息 单质是空气中主要成分之一,其氢化物水溶液呈碱性 原子核外有两个未成对电子 日常生活中常见的金属,通常用电解法冶炼其单质 其简单阴离子带两个单位负电荷 单质有毒,常温下为有色气体,常用于自来水消毒 请结合表中信息完成下列各小题: (1)C在元素周期表中的位置是______,D的简单...
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