利用下列反应不能制得括号中纯净物质的是 A.乙烯与水反应(乙醇) B.乙烯与氯气

题型:选择题

问题:

利用下列反应不能制得括号中纯净物质的是

A.乙烯与水反应(乙醇)

B.乙烯与氯气反应(1,2-二氯乙烷)

C.液溴与苯用溴化铁作催化剂反应(溴苯)

D.等物质的量的氯气与乙烷在光照条件下反应(氯乙烷)

考点:烯烃的通式烯烃的通性乙烯
题型:选择题

液压系统供、排油管路固定卡子松动及时紧固和色标缺失及时设置。

题型:选择题

下图是“土壤中动物类群丰富度的研究”实验中常用的两种装置,下列有关叙述不正确的是

[ ]

A.A装置的花盆壁C和放在其中的土壤之间留一定空隙的目的是便于空气流通

B.B装置通常用于对体型较小的土壤动物进行采集

C.A装置主要是利用土壤动物趋光、避高温、趋湿的习性采集

D.用B装置采集的土壤动物可以放入体积分数70%的酒精溶液中

题型:选择题

依法有权指定传染病诊断标准和治疗要求的单位是()。

A.中华预防医学会

B.中华医学会

C.国务院卫生行政部门

D.省级卫生行政部门

E.国家疾病预防控制中心

题型:选择题

用动物肝脏治疗夜盲症的最早医家是:()

A.孙思邈

B.张仲景

C.葛洪

D.华佗

E.巢元方

题型:选择题

阅读理解

     When we were young, we had dreams and expectations. We imagine things, we keep thinking

about what we want to be, what we want to do, what makes us proud and happy and what we will

become.

     We grew up, and everything seemed like having its own way. We accept our success or failures

and we move on. The change, the need to do the important things, the jobs, the pressures and the

failures, all kill part of our dreams.

     Things have changed, but they cannot really take away the dreams. We still have to dream on, to

realize our desires, our wants, our future, even when we are considered too old for such things. Cornel

Sanders started his business when he was sixty, and started the whole successful KFC business. The

main thing is not the age-whether being too old, or too young, but it is the desire to dream on, and the

courage to realize it.

     Having a dream, taking it to sleep, thinking about it, planning it, and adding all the fun to our dreams

will make us a bit closer to the realization of our dreams.

     Businessmen start with a dream, a simple wish of small restaurant operation, or a huge business of

real-estate(房地产) development, or a training center for English education, or just any other

self-employed money earning fun.

     The ability to dream on is one of the fine qualities of human race that other animals do not have. So

dream on, and put a deadline:make it a giant dream, a small one, an old one, a newfound one, a hobby

related one, a change of life one, a religious one, a stupid one, or just whatever. . . just continue to

dream on. . . Then, Just Go and Do It!

1. According to the passage, which of the following may not cause the failure of our dreams?

A. Changes in life.   

B. Jobs.

C. Pressures.  

D. Working hard.

2. The writer mentioned KFC in this passage in order to tell us __________.

A. If you want to succeed, you have to wait to work at 60

B. KFC is quite popular with all the young people in the world

C. It is not the age but the desire and courage that makes your dream come true

D. Cornel Sanders the founder of KFC had a dream when he was young

3. What does the underlined word "giant" in Paragraph 6 probably mean?

A. Big.  

B. Small.

C. Wise.  

D. Common.

4. Which of the following is the most suitable title for this passage?

A. Dream on

B. Dream and Facts

C. KFC and Dream

D. One World, One Dream

更多题库