问题 多项选择题

关于“补体参与的抗原抗体试验”,下列哪些叙述是不正确的?()

A.红细胞与溶血素结合

B.红细胞与抗原结合,导致溶血

C.补体与抗原或抗体结合,导致不溶血

D.补体与受检系统的抗原抗体复合物结合,导致溶血

E.既可检测抗原,又可检测抗体

答案

参考答案:B, C, D

阅读理解

阅读理解。

      BEIJING-The two-day visit to Washington has been heavy for British Prime Minister Gordon Brown as

he attempts to improve ties with Washington and promote his international image ahead of the upcoming G-20

economic summit in London.

Special Relationship

      Brown had been praising the "special relationship" between Britain and the United States before he traveled

to Washington. "There is no international partnership in recent history that has served the world better than

the special relationship between Britain and the United States," Brown said in an article in The Sunday Times

of London. Such enthusiasm was quickly responded by Barak Obama, the new leader of the world's largest

economy. "The special relationship between the United States and Great Britain is one that is not just important

to me, it is important to the American people," told reporters after meeting with Brown. 

      Brown was the first European leader to meet Obama at the White House, and this might help the British

leader make his image smooth among countrymen in a turbulent (动荡) time and put him in a better position to

appear side by side with Obama at the April G-20 summit that will consider the international economic crisis.

Global New Deal

      The talks between Brown and Obama were expected to focus mainly on measures to jump-start

international economic growth in the most serious downturn in decades. Brown will first promote his "goal

new deal" with Obama before taking the G-20 talks. The prime minister, who is chairing the G-20 gathering,

has said he would push for deep adjustable changes and joint efforts from all of the world's major economies,

developed and developing, to correct financial rules and inspire the global economy.

      However, as pointed out by many analysts, there is the potential for bitterness between Britain and the

United States. That's because no small number of Britons believe themselves to be victims of a crisis which

they say was set off by the United States. Meanwhile, analysts say it was unrealistic to expect another

honeymoon for British-US ties as Obama seems to have attached more importance to the Pacific region than

to Europe.

1. Brown paid the two-day visit to Washington in order to _____.[ ]

A. improve the ties with the US and his image

B. make Obama's international image better

C. congratulate Obama on coming into power

D. prepare for the coming G-20 economic summit

2. The April G-20 summit will mainly focus on how _____. [ ]

A. to solve the international energy crisis

B. to solve the international economic crisis

C. to relax current international tension

D. to achieve the double-win goal lately

3. According to many analysts, there is the potential for bitterness between the UK and the US

    because _____. [ ]

A. Obama is less friendly to Brown than Brown to Obama

B. Obama hasn't visited the UK yet as a new president

C. Obama seems to have attached more importance to Europe than to the Pacific region

D. many Britons believe themselves to be the victims of a crisis caused by the US

4. The underlined part in the last paragraph suggests that _____.[ ]

A. Britons expect too much from Obama

B. Britain and USA used to have close relationship

C. the relationship between the two countries will break up

D. Obama and the first lady will not spend their honeymoon in Britain

填空题