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【简答题】
数据库的三级模式结构是指数据库系统是由外模式、 和内模式三级构成。
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举一反三
【单选题】The __________people even keep the custom of offering nine-layer cakes to their ancestors on Winter Solstice.
A.
Fujian
B.
Taiwan
C.
Jiangsu
D.
Zhejiang
【单选题】People like to eat mutton on Winter solstice because it can help them ________
A.
keep warm
B.
have good fortune
C.
drive away ghosts
D.
provide nutrition to the body
【单选题】There is a saying in Shandong province which goes, “eat ______ on Winter Solstice and eat ______ on Summer Solstice.”
A.
noodles, tangyuan
B.
noodles, jiaoz
C.
tangyuan, noodles
D.
jiaozi, noodles
【判断题】On Winter Solstice, the sun reaches its southernmost point, the northern hemisphere has the shortest day.
A.
正确
B.
错误
【判断题】On Winter Solstice, there is a saying that goes “Eat dumplings on Start of Winter Day, or your ears will be frostbitten”.
A.
正确
B.
错误
【判断题】On Winter Solstice, there is a saying that goes “Eat dumplings on Start of Winter Day, or your ears will be frostbitten”.
A.
正确
B.
错误
【单选题】Eating dumplings on winter solstice is a custom to commemorate________
A.
Xishi
B.
Zhangzhongjing
C.
Nvwa
D.
Lishizhen
【简答题】会展组织者与参展商之间签订的主要是什么合同?
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