搜题请搜索小程序“爱下问搜题”
问题 解答题

命题“原函数与反函数的图象关于y=x对称”的否定是______．

答案

题设隐含全称量词“所有的”．

故题设的否定为存在一个原函数，结论为原函数与反函数的图象不关于y=x对称

∴原命题的否定为：存在一个原函数与反函数的图象不关于y=x对称．

故答案：存在一个原函数与反函数的图象不关于y=x对称．

单项选择题

泌尿系统肿瘤最主要的临床特点是

A．无痛性全程血尿

B． 尿频和尿痛

C．排尿困难

D．腹部肿块

E． 尿失禁

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句型转换

按下列各小题括号内的要求改写句子，每空限填一词。

1. Meimei has to look after her little brother at weekends. (改为一般疑问句) 　　 

    ________ Meimei ________ to look after her little brother at weekends? 　　

2. Both he and his deskmate have passed the exam. (改为否定句) 　　

    ________ he nor his deskmate ________ passed the exam. 　　

3. Let us stop and have a rest, ________?(完成反意疑问句) 　　

4. We have fine weather today. (改为感叹句) 　　

    ________ ________ weather we have today! 　　

5. They are asked to write a diary in English every other day. (就划线部分提问) 　

　________ ________ are they asked to write a diary in English? 　

6. Didn't they tell you about it? (改为被动语态) 　

　________ you ________ about it? 　

7. Will the 29th Olympic Games be held in Beijing? Could you tell me? (合并成含有宾语从句的复合句) 　　

    Could you tell me ________ the 29th Olympic Games ________ be held in Beijing?

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