问题 单项选择题 A1/A2型题

大肠菌群在伊红亚甲蓝分离平板上,下列菌落检出率最高的是()

A.菌落呈黑色

B.菌落呈红色者

C.菌落呈黑紫色有光泽或无光泽

D.菌落呈粉红色者

E.菌落呈黑紫色无光泽者

答案

参考答案:C

解析:伊红亚甲蓝平板中有乳糖,大肠菌群可发酵乳糖产酸,使伊红与亚甲蓝结合而成黑色化合物,故菌落呈黑紫色,有时还可产生金属光泽,黑色程度与光泽产生情况与伊红、亚甲蓝二者比例有关。

阅读理解

Picasso,the famous Spanish painter,was born in 1881.His father was an art teacher.Picasso began to paint very early.He was admitted to the Royal Academy of Art at the age of 15.After 1900,he spent much time in Paris,living there to 1947,then he moved to the south of France.

Throughout his career,Picasso moved from style to style with ease.He practised sculpture illustrated books and also showed great interest in pottery design and other fields of art.

Picasso produced a great number of drawngs in his life.No later artist of the school of Paris has replaced him in international influence.

Picasso is generally considered to be the foremost figure in the 20th century French art.His paintings are now exhibited in leading European and American galleries.

小题1:The main idea of the passage is_________.

A.Picasso is considered to be the foremost figure in the 20th century French art

B.Picasso is a famous Spanish painter

C.Picasso spent much time in Paris,living there from 1940 to 1947

D.Picasso’s life and art小题2:How long did he stay in Spain and France?

A.15 years in Spain and 43 years in Paris.

B.15 years in Spain and the rest of life in Paris.

C.Over 19 years in Spain and the rest of life in Paris.

D.He didn’t stay so long in Paris.小题3:Picasso moved from style to style with ease.It seems _________.

A.he did not like only one style

B.he changed his style without difficulty

C.he not only liked sculpture,but also liked pottery design

D.he showed great interest in other fields of art小题4:His paintings are now exhibited in leading European and American galleries,because _________.

A.he was a Spanish artist

B.he was a French artist

C.he was famous in French art

D.he produced a great many wonderful drawings in different styles

单项选择题