下列山脉属于我国地势阶梯第二阶梯和第一阶梯分界线的是（）A.祁连山 B.太行山 C.

（共10分）化学式为C₁₁H₁₂O₄的芳香族化合物A、B互为同分异构体，A和D都能发生银镜反应，E的一溴取代物只有两种，A经①、②两步反应得C、D和E。B经①、②两步反应得E、F和H。上述反应过程、产物性质及相互关系如图所示。

（1）A有2种可能结构，写出其结构简式                                           。

（2）在B、C、D、F、G、I化合物中，互为同系物的是                                  。

（3）写出D与F在加热和浓H₂SO₄催化作用下发生反应的化学方程式                

                                   ，指出反应类型                      。

（4）除银镜反应外至少选用其它两种实验方法证明D具有还原性，请按要求填写下表：

	所选试剂	观察到的实验现象
方法1
方法2

某化妆品企业于2005年3月8日将一批自制护肤品用于职工福利，该产品无同类消费品销售价格，该批产品成本为10万元，成本利润率为5%，消费税税率为8%，该批产品应纳消费税税额为( )万元。

A．0.91

B．0.84

C．0.78

D．0.74

利用（）说明时间比较直观。

A．赤道面平面图

B．子午面投影图

C．子午面天球图

D．真地平平面图

写作

     假如你是李华，你的英国笔友Jack来信询问中国人是如何庆祝国庆的。请根据以下提示，给他回一封电子邮件。

1. 普天同庆:大街小巷及各大商店焕然一新，悬挂中国国旗，有些出租车和私家车也悬挂国旗。

2. 庆祝活动:各地电视台推出国庆专题文艺节目，普通社区自发举行各种形式的庆祝活动。

3. 休闲度假:国庆期间，人们可以外出旅游, 也可以回家与家人团聚等。

注意：1.不要逐字逐句翻译。

            2. 词数120左右(开头与结尾已给出，不计入总词数)

Dear Jack,

You asked me in your letter how people in China celebrate National Day. Let me tell you.

________________________________________________________________________________

________________________________________________________________________________

                                                                                                                                                  Yours, 

                                                                                                                                                  Li Hua

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