[单项选择]--Will you please spare me a few minutes to accept my interview now, Mr. Yang Liwei -- （）. But I′ll be free this evening. Would you mind A. No, I don′t B. Yes, with pleasure C. I′m afraid not D. Yes, I′d be glad to
第24题: [单项选择]若要删除关系S中的行，删除行的值分别列出如下 Ⅰ．('S10'，'宇宙'，'上海') Ⅱ．('Z01'，'立新'，'重庆') 它们中哪个(些)可以被删除 A. 只有Ⅰ B. 只有Ⅱ C. Ⅰ和Ⅱ D. 都不可以 参考答案:B 答案解析:[解析] 这里假定DBMS不支持级联修改功能，即要求删除的供应商关系S中的行的主键不能被其他关系引用，‘B01’、‘T20’、‘S10’所在的行不能被删除，故只有Ⅱ可以被删除。
第32题: [多项选择]Write a congratulation letter to your counterpart in another country who has recently been promoted to be the Minister of Trade. You should write approximately 100 words. Do not sign your own name at the end of your letter. Use"Li Ming"instead. You don’t need to write the address. 参考答案: One possible version: Dear Mr. Minister, Allow me to convey my congratulations on your promotion to Minister of Trade. I’m delighted that many years service you have given to your country should have been recognized and appreciated. We wish you success in your new post and look forward to closer cooperation with you in the development of trade between our two countries. Yours truly, Li Ming
