问题 多项选择题

以下对武夷山描述正确的有()。

A.被誉为“道南理窟”

B.是道家的“第十六洞天”

C.有古越人的架壑船棺

D.属典型丹霞地貌

答案

参考答案:A, B, C, D

填空题

(14分)已知A、B、C、D、E为中学化学常见的五种物质,均含元素R,R在A、B、C、D、E中所呈化合价依次递增,其中只有B为单质。常温下,A、B、C、D为气体,且D+H2O→C+E。

请回答下列问题:

⑴元素R在元素周期表中的位置为_________    ____; B分子的电子式为__________。

⑵已知气体D与NaOH溶液1:1恰好完全反应,生成R的两种含氧酸盐,所得溶液中各离子浓度大小关系                                            

⑶将22.4L某R的氧化物与足量的灼热铜粉完全反应后,气体体积变为11.2L(体积均在相同条件下测定),则该氧化物的化学式可能为           。(填序号)

①、RO2     ②、R2O3    ③、RO    ④、R2O

⑷科学家制备的另一种化合物,与A的组成元素相同,具有很高的热值,可用作火箭和燃料电池的燃料。该化合物可由次氯酸钠溶液和A反应得到,写出该反应的化学方程式              

⑸M为E的钠盐,一定条件下可发生如下反应:

①设计实验方案,鉴定常见物质N                                               

②此外,科学家还制备了另一种钠盐X,其与P的组成元素完全相同,X中的阴离子与P中的阴离子表观形式相同(元素种类和原子个数均相同),但X中阴离子的结构中含有一个过氧键:-O-O- ,电导实验表明,同条件下其电导能力与NaCl相同,钠盐X的阴离子与水反应生成过氧化氢的离子方程式为                                    

25℃平衡体系(苯、水、HA)平衡常数焓变起始总浓度
在水中,HAH+AK1△H13.0×103 mol·L1
在苯中,2HA(HA)2K2△H24.0×103 mol·L1

阅读理解

阅读理解。

      Like a growing number of young women in Vietnam's northern part city of Haiphong, Pham Thi Hue

was infected with HIV by her husband, one of the town's many drug users. But instead of being shamed

into silence, as Vietnamese with HIV and AIDS are, the 25-year-old tailor and mother of one child went

public, appearing on television and at conferences. Her business suffered and her neighbors insulted (辱骂)

her, but Hue has now become the public face of Mothers and Wives, an HIV/AIDS support group established

in Haiphong by a Norwegian nongovernmental organization and her neighborhood's People's Committee. Last

year, she founded a smaller group named after a local flower. People who need advice on treatment or help

can dial a hot line and get assistance from able and empathetic (同情的) HIV victims. "We gather to support

each other," Hue says. "When we are sick, what we need most is encouragement and comfort from people

who understand our situation and are willing to share our happiness, as well as our sadness."

      On a hot and damp night last month, Hue welcomed into her small home a very thin woman, also a tailor,

who was HIV positive. The woman tearfully told Hue that she had not told anyone about her condition, fearing

that she would lose customers and that her daughter would be insulted at school. Hue became the wise elder,

offering medical and personal advice.

1. What did Pham Thi Hue do after she was infected with HIV? [ ]

A. She kept silent.

B. She worked as usual.

C. She stayed at home and cried every day.

D. She went public and gave help to others.

2. It can be inferred from the passage that the group Pham Thi Hue founded is made up of ______. [ ]

A. drug users

B. HIV victims

C. all kinds of patients

D. poor people

3. From the passage we can learn that Pham Thi Hue is a woman who is ______. [ ]

A. weak and kind

B. foolish and idle

C. brave and helpful

D. cautious and energetic