问题 多项选择题

常规气相色谱定性分析的准确度并不很高,其主要原因是( )。

A.检测器的定性检测能力有限

B.每个色谱峰不一定只代表一种组分

C.待分析样品过于复杂

D.缺乏特征性强的定性分析依据

答案

参考答案:A,B

多项选择题
阅读理解

International students in Christine Rhodes’ English class in Australia share their favorite places they have visited in Australia.

Canberra, the nicest city in Australia.   

Siggi Siebold from Germany

I went for a short holiday to Canberra because my son lives there. It’s the nicest city in Australia, a little bit similar to Cairns. There’re lots of big rivers and trees around the city.

The small city of Mount Isa

Indra Ekanayake from Malaysia

I came to Mount Isa six months ago. It’s a long way from Brisbane-about 2,000 km .It’s a small city, with a population of 21,000, but it has all the basic facilities(设施)such as a hospital, six schools and supermarkets. It’s a mining city. It’s hot and gets little rain. There’re two big lakes to keep the rainwater for drinking for the city.

Lake Moondarra and a mine

Ida Robb from Indonesia

In Mount Isa, there’s a dam called Lake Moondarra. On the weekend you can go there with your friends.People go fishing and even catch a crocodile. There’s a big mine in Mount Isa.Many people come to work in the mine and earn much money.It isn’t a beautiful green place, but many people love it.

My impression(印象)of Sydney

Namfon  Pitaxsin from Thailand

The fist time I came  to  Australia,I was happy. I traveled to Sydney. Four million people live there ,and many are  Asians. I saw the harbor (港口),Sydney Harbor Bridge and the Opera House and I went to see the koalas and kangaroos in Taronga Park Zoo. After that I went to the Thai restaurants. There is a revolving (旋转的) restaurant, so you can eat and see the city.

小题1:Why did Siggi Siebold go to Canberra?

A. Because it’s the nicest city in Australia.

B.Because her son lives there

C.Because it is similar to her hometown

D.Because there’re lots of rivers小题2:According to Indra Ekanayake, Mount Isa______

A.is a famous harbor in Ausralia

B.has a large population

C.probably doesn’t have enough drinking water

D.doesn’t have enough basic facilities小题3:Where is Lake Moondarra?

A.  In Canberra.      B. In Mount Isa.        C.In Brisbane.      D.In Sydney

64.The first time Namfon  Pitaxsin went to Australia, she________

A. saw some special Australian animals

B. met more Americans than Asians

C. ate in a revolving restaurant

D. enjoyed the music in the Opera House

小题4:How many cities does the passage mainly talk about?

A.Two

B.Three

C.Four.

D.Five