怎样用因式分解法解三次方程?举例?

What does the man say about himself？

A．He doesn"t have a studying brain.

B．He is afraid of examinations.

C．He doesn"t have a gift for English.

D．He hates to be a postgraduate.

请帮忙给出正确答案和分析，谢谢！

All of the following are the plans the woman mentioned EXCEPT______.

A．doing some volunteer work

B．doing some exercise

C．making some friends

D．enjoying the recreational activities

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学校卫生监督工作的主要执行依据是

A、《中华人民共和国宪法》

B、《中华人民共和国义务教育法》

C、《中华人民共和国未成年人保护法》

D、《中华人民共和国传染病防治法》

E、《学校卫生工作条例》

请帮忙给出正确答案和分析，谢谢！

Why does the man look so tired？

A．He worked for the whole night.

B．He played computer games last night.

C．He talked with his roommate last night.

D．He was bothered by the noise in his room.

请帮忙给出正确答案和分析，谢谢！

We can infer from the passage that______.

A．when put into water, nanaoparticles are highly active and hot enough to vaporize it

B．the steam bubble with some nanoparticles in it would float to the surface with steam released

C．once the nanoparticles are used up, new ones should be put into the water again

D．efficient use of steam may reduce the energy cost in some industrial processes

请帮忙给出正确答案和分析，谢谢！