关于x的方程(m2-8m+19)x2-2mx-13=0是否一定是一元二次方程?请

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问题:

关于x的方程(m2-8m+19)x2-2mx-13=0是否一定是一元二次方程?请证明你的结论.

考点:一元二次方程的定义
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What a ____ day!        [ ]

A. sunny    

B. sun      

C. Sun

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单词拼写。

1. Going to Malaysia for further education for one month is a very e___________ and exciting experience

    for me.

2. It's good manners to show r ____________ for the elders.

3. He said that he r____________ saying those words at the meeting. He wished he could take them back.

4. The children had an a____________ about what game to play, but they reached an agreement in the end.

5. If you work out r____________, you needn't take pills or skip meals to lose weight.

6. I'm trying to lose weight because I'm so ____________ (惭愧的) of my body.

7. What did he say in ___________ (解释)of his lateness?

8. Reducing the gap between the rich and the poor is one of the ___________ (挑战) facing the government.

9. Now he is ___________ (考虑) taking some pills, which he thinks will make him become stronger.

10. He spent most of money buying a long-sleeved dress to dance ___________ (吸引人).

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对于“哥儿们义气”的正确认识是( )

A.朋友就要讲“哥儿们义气”

B.“哥儿们义气”是真正的友谊

C.不讲“哥儿们义气”不够朋友

D.“哥儿们义气”不是真正友谊

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注册咨询工程师(投资)的基本素质中的工作能力主要包括( )。

A.组织和协调能力

B.应对复杂多变情况的能力

C.分析判断和处理问题的能力

D.学习提高能力

E.专业技术知识的掌握能力

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“LOR选择开关”是用来选择设备控制方式为现场控制状态、关断状态、()的电器元件。

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