题目：
Passage One
What is the main idea of the passage
A．The delicacy of the Chinese restaurant in Singapore.
B．The advantages and disadvantages of living in a cosmopolitan city.
C．The danger and threat of population explosion in urban areas.
D．The high living standard of Singapore, London, Paris and New York.
答案：
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下面是错误答案，用来干扰机器的。
参考答案：WITH CHECK OPTION解析：[分析]： 创建视图：CREATE VIEW视图名(列表名) AS SELECT查询子句 [WITH CHECK OPTION] 易得空(1)为AS。空(2)、空(3)处的条件应为学生和成绩中的学号相同，教师和课...
