锅炉冷态启动时，锅炉上水至汽包可见水位（）应停止上水。 A.以下－25~－30mm

Dear Mr Zhu,

I am writing to your magazine’s “Teenagers Now” column(专栏) to ask for some help with my 16-year-old son. At the moment, he refuses to do almost everything his mother and I ask him to do. He is our only child and we treat him very well. His grandparents buy him many things, and yet he is still rude to us. He refuses to spend time with us or do as we tell him. Sometimes he acts as if he doesn’t even love us at all.

Now he refuses to do his homework, and instead insists on wasting his time watching DVDs and listening to foreign music. I cannot understand this music, but I don’t like it. He also spends too much time in Internet cafes, where he either plays games or chats online. He is wasting valuable time during this important period in his life!

What am I to do? At present, to prevent making his mother unhappy with an argument, I am allowing him his freedom. However, I am worried that if I keep allowing him to do what he wants, he may fail at school, or worse.

How can I help my son without harming our relationship?

Yours,

Liu Zhenhua

小题1:What’s Mr. Zhu’s job?

A．A teacher.

B．A magazine columnist.

C．A youth worker.

D．A doctor.小题2:From the passage, we can know that Mr. Liu’s son is _______ to his parents.

A．friendly

B．thankful

C．polite

D．rude小题3:What does Liu Zhenhua write to Mr. Zhu for?

A．To blame his son.

B．To ask for help with his son.

C．To say something about his son.

D．To complain to him about his son.小题4:Mr. Liu’s son always spends his time _______.

A．doing his homework

B．playing games online

C．chatting with his parents

D．doing everything his parents ask him to do小题5:What do you think is the possible answer for the father?

A．The father should let the son alone.

B．The father should give his son a beating.

C．The father should allow his son his freedom.

D．The father should be patient enough to have communication with the son.

2009年10月12日《人民日报》报道，从徒劳无功的祭天祈雨，到兴修水利、生态治理，再到建立全国抗旱信息系统和抗旱物资储备制度、探索旱灾保险机制、建设社会化抗旱服务体系等，惨痛的灾害之后，人类的认识日渐深化，抵御天灾的能力不能提高。上述事实充分说明

A．意识对物质的反作用受物质决定作用的制约

B．人的主观能动作用是不断增强的

C．矛盾存在于一切事物中

D．人的主观能动作用制约着规律作用的发挥

把( )作为研究中心，是近代生态学的特点。

A．生物与环境

B．种群

C．群落

D．生态系统

深圳某中外合资制药企业，中外双方股权比例为6：4。1992年8月开始营运，经营期为20年。开始营运当年企业获利，但企业选择从下一年度起计算减免税优惠期限。下表是该企业从1992年到2001年的获利情况(不考虑地方所得税)(单位：万元)：

年度	1992	1993	1994	1995	1996
获利情况	40	-50	100	120	160
年度	1997	1998	1999	2000	2001
获利情况	180	230	300	210	250

1999年该企业被国家有关部门确认为先进技术企业。1999年该企业外方投资者将所分得的税后利润的70%再投资扩建本企业；在2000年的审核中该企业没有被继续确认为先进技术企业。2001年该企业购买国有设备的固定资产投资额为10万

外方投资者1999年冉投资应退税款 ( )万元。

A．3.36

B．3.45

C．8.4

D．21

艾滋病是哪一年被发现的？