问题 选择题

下列实验操作正确的是(  )

                

A.称量氢氧化钠

B.过滤

C.测定溶液pH

D.稀释浓硫酸

答案

答案:B

题目分析:A、氢氧化钠具有强烈的腐蚀性,不能放在纸片上称量,应放在左盘的烧杯中称量,图中所示操作错误;B、过滤液体时,要注意“一贴、二低、三靠”的原则,图中所示操作正确;C、用pH试纸测定未知溶液的pH时,正确的操作方法为用玻璃棒蘸取少量待测液滴在干燥的pH试纸上,与标准比色卡对比来确定pH.不能用手将pH试纸伸入待测液中,否则会污染待测液,图中所示操作错误;D、稀释浓硫酸时,要把浓硫酸缓缓地沿器壁注入水中,同时用玻璃棒不断搅拌,以使热量及时地扩散;图中所示操作,标签没有向着手心,会腐蚀标签,操作错误

阅读理解

(2013·高考新课标全国卷Ⅱ,B)In 1947 a group of famous people from the art world headed by an Austrian conductor decided to hold an international festival of music,dance and theatre in Edinburgh.The idea was to reunite Europe after the Second World War.

It quickly attracted famous names such as Alec Guinness,Richard Burton,Dame Margot Fonteyn and Marlene Dietrich as well as the big symphony orchestras(交响乐团).It became a fixed event every August and now attracts 400,000 people yearly.

At the same time,the “Fringe” appeared as a challenge to the official festival.Eight theatre groups turned up uninvited in 1947,in the belief that everyone should have the right to perform,and they did so in a public house disused for years.

Soon,groups of students firstly from Edinburgh University,and later from the universities of Oxford and Cambridge,Durham and Birmingham were making the journey to the Scottish capital each summer to perform theatre by little­known writers of plays in small church halls to the people of Edinburgh.

Today the“Fringe”,once less recognized,has far outgrown the festival with around 1,500 performances of theatre,music and dance on every one of the 21 days it lasts.And yet as early as 1959,with only 19 theatre groups performing,some said it was getting too big.

A paid administrator was first employed only in 1971,and today there are eight administrators working all year round and the number rises to 150 during August itself.In 2004 there were 200 places housing 1,695 shows by over 600 different groups from 50 different countries.More than 1.25 million tickets were sold.

小题1:What was the purpose of Edinburgh Festival at the beginning?

A.To bring Europe together again.

B.To honor heroes of World War Ⅱ.

C.To introduce young theatre groups.

D.To attract great artists from Europe.小题2:Why did some uninvited theatre groups come to Edinburgh in 1947?

A.They owned a public house there.

B.They came to take up a challenge.

C.They thought they were also famous.

D.They wanted to take part in the festival.小题3:Who joined the“Fringe”after it appeared?

A.Popular writers.

B.University students.

C.Artists from around the world.

D.Performers of music and dance.小题4:We may learn from the text that Edinburgh Festival________.

A.has become a non­official event

B.has gone beyond an art festival

C.gives shows all year round

D.keeps growing rapidly

判断题