第31题: [单项选择]Why do sharks normally swim between ten and twenty miles off the coast of Britain A. They prefer warm water to cold water. B. They see best in deep water. C. They are afraid of man. D. That is where their food is. 参考答案:D 答案解析:由第三段第一句就可以得到答案。
第33题: [单项选择]查找数据时,设查找内容为“b[!aeu]ll”,则可以找到的字符串是________。 A. bill B. ball C. bell D. bull 参考答案:A 答案解析:[知识点] 数据库和表的基本操作/查找数据 [评析] 通配符“!”被定义为“通配不在括号之内的字符”。本题中的第二个字符不能为“a”、 “b”和“u”。