问题 选择题

下列实验操作不能达到实验目的的是

 实验目的实验操作
A证明乙烯能发生加成反应将乙烯气体通入溴的四氯化碳溶液中
B鉴别Fe(OH)3胶体和FeCl3溶液用激光笔分别照射两种物质,从侧面观察是否出现光亮的通路。
C检验酒精中是否含有水取少量酒精加入无水硫酸铜粉末
D鉴别苯、环已烯和已烷加入酸性高锰酸钾溶液
 

答案

答案:D

题目分析:A、将乙烯气体通入溴的四氯化碳溶液中,溴的四氯化碳溶液褪色,证明乙烯能发生加成反应,正确;B、鉴别胶体与溶液用丁达尔效应,正确;C、无水硫酸铜粉末结合水变蓝色,正确;D、加入酸性高锰酸钾溶液只能鉴别出环己烯,苯与己烷无法 鉴别,产物,答案选D。

单项选择题 A1/A2型题
阅读理解

For the last couple of weeks, I had been stuck in front of my computer working on a project that was very important to me. My every waking hour was consumed by the project and although I imagined that I would feel happy after completing parts of the project, I was confused to find that instead, I was feeling rather depressed. I tried a range of methods to help cheer myself up. I had a relaxing bath, cooked a delicious meal to enjoy with my family and even watched a lighthearted movie, but to no avail. It was only when I turned to meditation(沉思)for a solution that the answer came to me: turn to nature!

The very next day, I grabbed my camera and a bottle of water and set off to spend a few hours walking in a nature reserve, even though it was pouring with rain. Within a couple of minutes I felt alive again. To be honest, I felt like a young school girl again and had to stop myself from hopping along the path singing, "I'm singing in the rain", a song I used to sing when I was a child. I think as adults we often try too hard to control our inner children and as a result we restrain(限制) our own spirits, which only leads to depression and stress.

Interestingly, it has been shown that people who spend 40 minutes walking in a nature reserve have a drop in their blood pressure levels, but this does not happen when they spend a similar amount of time walking in a busy city centre.

If you feel a little low in spirit and know that you have spent too much time indoors, relax completely, remove your shoes and let your inner child come out and play.

小题1: The author felt depressed because she __________.

A.couldn't consume her waking hour

B.had not seen a film for a long time.

C.had not finished her work on time

D.had worked on a hard job for too long小题2:The author walked in a nature reserve in the rain in order to__________.

A.take photos

B.find a solution to the project

C.hop along the path

D.cheer herself up小题3: The underlined part "to no avail" in Paragraph 1 probably means " __________.".

A.unsuccessful

B.unrelated

C.uninteresting

D.unexpected小题4:In the author's opinion, __________.

A.a bath can make people relaxed

B.depression is usually caused by hard work

C.walking in a busy city centre harms people's health

D.adults should express their inner feelings freely小题5:The last paragraph mainly serves as a(n) __________.

A.explanation

B.suggestion

C.introduction

D.reminder