在Visual Basic应用程序中，以下正确的描述是 ______。A．过程的定义

国际公认的临床试验需要观察的项目不包括（）。

A.不良反应

B.肿瘤体积的改变

C.缓解期和生存时间

D.药物性状的变化

E.生活质量

阅读理解

      Frederick Law Olmsted (1822－1903), a Connecticut farm boy, saw his first public park in

Liverpool, England, as he accompanied his brother on a walking tour.He was impressed by the

park's winding paths, open fields, lakes and bridges.Perhaps the most wonderful things of all was

that the park was open to everyone.

      A moment beginning in 1840 to set aside park land on New York City's Manhattan Island had

a successful result in 1856 with the purchase of 840 acres of rocky and swampy (沼泽的) land,

bought with about $5 million in state funds.Olmsted's chance of meeting with a project organizer led

to his applying for the job of the park manager.In 1857 Olmsted was appointed manager of the

proposed park, and the clearing of the site began.

      Calvert Vaux, a British architect, asked Olmsted to collaborate with him on a park design, and

Olmsted agreed.Vaux saw the park as a work of art, while Olmsted saw the park as a place for

people to escape the noise of the city.Together they invented a plan that would give the persons and

animals living in the city a quiet, green park and would also preserve and increase the good qualities

of the natural features of the land.The commissioners voted in favor of Vaux and Olmsted's plan, and

in 1858, the two became the official designers of New York City's Central Park.

     It took cartloads of topsoil to build Central Park's gentle slopes, shady glens, and steep, rocky

ravines.Five million trees were planted, a watersupply system was laid, and bridges, arches, roads

and paths were constructed.The park officially opened in 1876, and today, well over a century later,

people still escape the noise of the city in Olmsted and Vaux's great work of art.

1. What is the text mainly about?

A. A history of the planning of Central Park.

B. An engineering plan for Central Park.

C. A biography of Frederick Law Olmsted.

D. A guided walking tour of Central Park.

2. Olmsted became manager of Central Park because of________.

A. his friendship with Calvert Vaux

B. his hard work in clearing the land

C. his winning a design competition

D. a chance of meeting with one of the park's organizers

3. The underlined word "collaborate" in the third paragraph means "________".

A. disagree  

B. comment

C. vote  

D. work together

4. Which of the following is TRUE about Central Park?

A. It is out of date nowadays.

B. The designers came from the same country.

C. It is an old park in America.

D. It is only for people who can well afford it.

飞机燃油系统的功用是（）

A.储存燃油

B.可靠地向发动机供油

C.储存燃油和可靠地向发动机供油

D.加油和抽油

A部件拉伸校正恢复尺寸后，对与它相连的B部件拉伸，要怎样处理（）

A、对B部件拉伸时力量小一些

B、边拉伸B件边测量A件

C、对A件进行辅助固定