自发性蛛网膜下腔出血最常见的原因()A．脑动静脉畸形 B．动脉硬化 C．烟雾病 D．

紧急移相是（）。

A.将触发角迅速增加到90°以上

B.将换流器从整流状态变到逆变状态

C.减小故障电流

D.加快直流系统能量释放

导肽和信号肽最后都要被切除。

Beatrix Potter was a great English writer and artist, best known for her children's books featuring animal characters such as in the children's classic—The Tale of Peter Rabbit.

Beatrix was born into a rich London­based family where she was tutored by very strict private teachers and so spent her youth isolated from other youngsters. During her youth she had a lot of pets and spent vacations in Scotland and also the Lake District. It was at the Lake District that she developed a love of wildlife. She studied the area's natural wonders carefully and painted them continuously.  But her old­fashioned, Manchester­born parents discouraged her intellectual improvement, thinking it inappropriate for a young lady. However, her study and watercolour paintings of wild mushrooms made her widely respected within the field of biology.

In her 30's, Beatrix Potter wrote the remarkably successful kid's book, The Tale of Peter Rabbit. Close to that time she became secretly engaged to her publisher Norman Warne. This caused a great disagreement with her parents, who did not approve of Beatrix getting married to somebody of lower social status. Sadly, Warne died before the marriage ceremony.

Ultimately Beatrix Potter began writing and also illustrating (绘图) kid's books full­time. Using profits from her books, Beatrix grew to become economically independent of her parents and was eventually in a position to buy Hill Top Farm in the Lake District.  She extended  the property with additional purchases of neighbouring land over time. In her 40's, Beatrix married William Heelis, a local lawyer. She ended up becoming a sheep breeder and farmer while continuing to publish as well as illustrate books for children. In all she authored 23 publications.

Beatrix died on December 22, 1943, and left the majority of her property to the National Trust. Her books carry on selling well globally, in many different languages. Her stories have been retold in numerous formats including a ballet, movies, and cartoons.

Such is her reputation, and that of the characters from her publications, that many Beatrix Potter statues have been created.  These tiny Beatrix Potter statues which include pretty much all the actual characters in her publications have become highly valued by art collectors and fans of her literature throughout the world.

小题1:What can we learn about Beatrix Potter's early life?

A．She learned drawing skills from her tutors.

B．She was very sociable and outgoing.

C．She was greatly inspired by the beauty of nature.

D．She was encouraged to think creatively and independently.小题2:Why did Beatrix Potter's parents oppose the idea of her marriage to Norman    Warne?

A．They did not believe she was mature enough to get married.

B．They thought Warne was only interested in Beatrix Potter's wealth.

C．They believed that the couple's characters were mismatched.

D．They considered Warne to be too common for their daughter.小题3:According to the passage, which part of the UK did Beatrix Potter love most?

A．Manchester.　　　　　　

B．Scotland.

C．The Lake District.

D．London.小题4:In which of the following areas did Beatrix Potter show an interest during her life?

A．Writing, biology, farming.

B．Drawing, nature, ballet.

C．Movies, farming, drawing.

D．Writing, mushrooms, travel.小题5:What is the function of the last two paragraphs of the passage?

A．To describe the consequences of Beatrix Potter's death.

B．To present the lasting cultural influence of Beatrix Potter and her works.

C．To show the changes in attitude towards Beatrix Potter's works over the past years.

D．To criticise the commercialization of Beatrix Potter's characters since her death.

报表格式的设置方式可以划分为：（）。

A.非混合和直观两种

B.非混合和混合两种

C.非直观和混合两种

D.非直观和直观两种

混凝土外加剂是指掺量在水泥质量的（）的能起改性作用的物质。

A.10%以下

B.5%以下

C.15%以下

D.3%以下