(15分)A、B、C、D是四种常见单质,其对应元素的原子序数依次增大,甲、乙、丙

题型:填空题

问题:

(15分)A、B、C、D是四种常见单质,其对应元素的原子序数依次增大,甲、乙、丙为常见化合物。它们之间有如下转化关系。请回答:

(1)工业上冶炼B的常用方法为______________(填字母)

a.电解法                  b.热还原法                c.热分解法 

(2)丙的水溶液显             性(填酸或碱),原因是(用离子方程式表示)

                                                                                      。

(3)D与甲溶液反应的化学方程式                                                 。

(4)将C单质通入KI的碱性溶液中,可生成碘盐中的一种添加剂,试写出其反应的离子方程式:__________________________________________________。

(5)一定条件下,2molB与3molD的氧化物W恰好反应,则W的化学式             。

考点:无机推断
题型:填空题

SD型阳离子染料属于()。

A.普通型

B.迁移型

C.分散型

题型:填空题

汽车运输由于要求时间紧,不能超过超过4次编组作业。

题型:填空题

阅读理解。

     Adrian's "Amazing Race" started early when his parents realized that he, as a baby, couldn't hear a thing,

not even loud noises. In a special school for the hearing-impaired (听觉受损的), he learned sign language and

got to mix with other disabled children. However, the sight of all the disabled children communicating with one

another upset his mother. She wanted him to lead a normal life. So after speaking to an advisor, she sent him to

private classes where he learned to read lips and pronounce words.

     Later on, Adrian's parents decided to send him to a regular school. But the headmaster tried to prevent them

from doing so, saying regular school couldn't take care of a special needs students. His parents were determined

to take the risk and push him hard to go through his work everyday because they wanted to prove that, given

the opportunity, he could do anything. Adrian made the grade and got accepted. It was a big challenge. The pace

(节奏) was faster so he had to sit at the front of the class and really pay attention to the teacher, which wasn't

always easy. But he stuck to it and did a lot of extra work after school.

     The efforts made by Adrian and his parents paid off. Adrian graduated with good grades and got into a top

high school. He also achieved a lot in life outside school. He developed a love for the outdoors and went to Nepal

to climb mountains. He even entered the World Yacht Race 05/06-being the first hearing-impaired Asian to do so.

     But none of these achievements would have been possible without one of the most important lessons from

his mother." "If you believe in yourself and work hard, you can achieve great results." She often said.

1. How did Adrian communicate with other children in the special school?

A. By speaking.

B. By using sign language

C. By reading lips

D. By making loud noises

2. Adrian's parents decided to send him to a regular school because _____.

A. they wanted him to live a normal life

B. they wanted to prove the headmaster wrong

C. he wouldn't mix with other disabled children

D. he wasn't taken good care of in the special school

3. How did Adrian finally succeed in his study?

A. He did a lot of outdoor activities.

B. He was pushed hard to study every day.

C. He attended private classes after school.

D. He worked very hard both in and after class

4. Why is Adrian's life described as an "Amazing Race"?

A. He did very well in his study

B. He succeeded in entering a regular school

C. He reached his goals in spite of his disability

D. He took part in the World Yacht Race 05/06

题型:填空题

,则=()。

A.A

B.B

C.C

D.D

题型:填空题

玉米杂交种的特点是杂交种只能种植(),必须在技术指导下每年在()条件下配制杂交种,保证供应生产所需的杂交种子。

A、第二代,自然

B、第二代,隔离

C、第一代,隔离

D、第一代,自然

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