问题 选择题

苯与乙烯、乙炔相比较,下列叙述正确的是   (  )

A.都容易发生取代反应

B.都容易发生加成反应

C.都能燃烧,且燃烧现象完全相同

D.乙炔和乙烯易被KMnO4氧化,苯不能被KMnO4氧化

答案

答案:D

题目分析:苯不易发生加成反应,乙烯和乙炔容易发生加成反应,不易发生取代反应,A、B不正确;由于含碳量不同,所以燃烧的现象是不同的,乙烯冒黑烟、乙炔和苯冒浓烟,C不正确,因此答案选D。

点评:该题是高考中额常见考点,属于基础性试题的考查,难度不大,记住加快。试题注重基础,主要是检验学生对三种有机物结构和性质对熟悉了解程度,有利于巩固学生的基础知识,培养学生的应试能力。

阅读理解
阅读理解。
Below is a housing guide for students going to London.
University accommodation (住所) offices
     Many university accommodation offices have their own list of registered landlords (房东). Others also
provide information on accommodation agencies and other housing organization. The advantage of using
your university accommodation is that you can get support if you have a problem. The disadvantage is that
they are unlikely to have enough registered landlords to house all their students.
Property papers: Loot and Renting
     Loot is an important source (来源) of information about private housing for co-renters. The offers are
from private landlords, agencies and individuals looking for other co-renters. They also have a website:
www.loot.com. The advantage of using Loot is that there are some excellent bargains. The disadvantage
is that there is no quality control over the offers.
Renting is another useful paper. The offers in this paper are mainly from accommodation agencies. Their
website is at www.renting.co.uk.
Accommodation agencies
     The majority of rented accommodation in London is probably advertised through accommodation
agencies. The advantage of using accommodation agencies is that you will have access to a large number
of accommodations. A good agent will listen to your requirements and can save you time in looking for the
right accommodation. The disadvantage is that they will make a range of charges to potential renters.
Noticeboards
     Around the universities you will find a number of noticeboards where offers of accommodation will
be posted. These will either be from landlords or from students. Some universities will also have online
noticeboards where students can advertise to other students. Advertisements from students can be an
excellent way to find accommodation. However, advertisements from landlords can be problematic.
Word of mouth
     Some of the best housing in London is never advertised but is passed on from one group of students
to another by word of mouth. It might be that you can find out about good offers from final year students.
However, don’t suppose that just because you have found out about housing from a friend it is necessarily
going to be better than that found through any other source.
Family
     Faced with the very high rents charged in London, some students and their parents will consider
buying as an alternative. In some cases this might be a good choice.
1. What is the advantage of using Loot?
A. It has more offers from accommodation agencies than Renting.
B. It gives you personal information about other co-renters.
C. Their website is designed mainly for students.
D. there are some good bargains.
2. A good agent can help you _____.
A. know more people
B. find cheap accommodation
C. get the right accommodation quickly
D. get free information about most accommodations
3. The information passed on by word of mouth is important because _____.
A. it is better than that found through any other source
B. it helps you find some of the best housing never advertised
C. the final year students always offer better information
D. the landlords have little valuable information
4. For students going to London for the first time, which of the following provides the most reliable
    information?
A. University accommodation offices.
B. Loot and Renting.
C. Noticeboards.
D. Family.
单项选择题