问题 选择题

如图是某同学制作洋葱表皮细胞临时装片操作过程时的几个环节,顺序正确的是(  )

A.②①⑦⑤③④⑥

B.⑦①③④⑤⑥②

C.⑦①②⑤③④⑥

D.②①③④⑦⑤⑥

答案

制作洋葱表皮细胞临时装片的实验步骤简单的总结为:擦、滴、撕、展、盖、染、吸.

“擦”,用干净的纱布把载玻片和盖玻片擦拭干净;

“滴”,把载玻片放在实验台上,用滴管在载玻片的中央滴一滴清水;

“撕”,把洋葱鳞片叶向外折断,用镊子从洋葱鳞片叶的内表面撕取一块薄膜;

“展”,把撕取的薄膜放在载玻片中央的水滴中,用解剖针轻轻的把水滴中的薄膜展开;

“盖:,用镊子夹起盖玻片,使它的一端先接触载玻片上的液滴,然后缓缓放平;

“染”,在盖玻片的一侧滴加碘液.

“吸”,另一侧用吸水纸吸引,重复2~3次,使染液浸润到标本的全部.

从图中可以看出:①是滴、②是擦、③是盖、④是染、⑤是展、⑥是吸、⑦是撕、因此正确的实验操作顺序是(用字母排序)②①⑦⑤③④⑥.

故选A.

阅读理解

IELTS: international English language testing system

Introduction: The IELTS is jointly managed by the University of Cambridge Local Examination Syndicate (剑桥大学考试委员会), the British Council (英国文化委员会) and IDP Education Australia (澳洲教育国际开发署)

Why more and more people are taking the IELTS test?

The IELTS test is widely recognized by the colleges, universities and other academic institutions of Australia, New Zealand, Canada and the United Kingdom. More and more universities and colleges in the US are also accepting an IELTS result as a language requirement for application to degree courses.

IELTS is accepted by many important organizations, such as the New Zealand Immigration Bureau, the Australian Immigration and Cultural Department, the Canadian Immigration Bureau, the Australian Medical Council and the British Medical Association (总会).

Choice of two test types

There are two test models: Academic and General Training. The candidate must select the one suitable to his/here purpose for taking the test.

Academic: for candidates who want to apply for undergraduate or postgraduate courses.

General Training: for candidates who take IELTS for immigration purpose, training programmes, or work experience.

If you have any questions about which type to take, consult the Examinations Services staff at the British Council offices.

Content

The test is composed of four papers: Listening, Reading, Writing and Speaking. The first three papers must be taken at one sitting on one day, and the speaking paper may be taken up to two days later. Usually in China, the Listening paper is taken on a Saturday morning, followed by the Reading paper, and then Writing paper. The Speaking test is usually taken on the Saturday afternoon or on the following Saturday. Candidates must complete all four papers in order to obtain an overall score.

小题1:How many organizations is IELTS managed by?

A.6.

B.5.

C.4.

D.3.小题2:Why are more and more people taking the IELTS test?

A.It is widely accepted by many countries.

B.It is widely recognized by many colleges, institutions and many important organizations.

C.It’s proof for people’s ability.

D.It’s interesting and acceptable.小题3:What kind of candidates should choose Academic test?

A.Candidates who want for immigration.

B.Candidates who want for training.

C.Candidates who want for work experience.

D.Candidates who want for undergraduate or postgraduate courses.小题4:In China, what’s the test order?

A.Reading, writing, speaking, listening.

B.Reading, speaking, listening, writing.

C.Listening, reading, writing, speaking.

D.Speaking, reading, listening ,writing

单项选择题 案例分析题