问题 问答题 简答题

人体ABH血型抗原、抗体各在什么时候形成?强度有何变化?

答案

参考答案:

ABH血型抗原在第5~6周胚胎的红细胞上即可检测出来,但直到出生时抗原性仍不太强,2~4岁时才发育完全,终生不变。

ABO血型抗体(IgM)在新生儿出生头几个月开始形成,5~6岁具有较高的效价,以后一直维持到青壮年期,到老年时期抗体水平又有所下降。

选择题
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◆A swimming coach from Moldova is looking for a job in Beijing. Qualifications as: Coach/Judge at National Standard; Olympian(Randed 12th in the world in 1995), World Cup Silver Medallist. Experienced children’s coach at all levels; Qualified driver(B,C,D,E categories); Bodybuilding instructor; Proficient in Russian, English, Romanian, Ukrainian.

Contact Max Cazmirciuc at: 13126711168 or email:mcazmirciuc@yahoo.com

◆     A retired president and CEO of two Canadian companies, interested in teaching English or

French in China.

Cellphone: 13520559132, email: Jeanguyfurois@aol.com

◆Web design graduates are available. For details visit: www.inhb.com, or call Liu or Tang at: 0311-3160000. Email: luogq@beinfo.net

◆Female Beijinger, 39, has a decade’s experience in import-export business, human resources management, interpretation and secretarial work. I have a good command of computer skills and am good at English, both writing and speaking.

Mobile: 13611163663

◆Laid-off workers are providing PC maintenance services such as system upgrade, virus detection and removal, data copying and recovering, system utilization and security.

Call:6732 7317

56. The purpose of the advertisement is_________.

A. to teach at a school              B. to start a business

C. to seek employment                D. to work as web designers

57. We can learn from the advertisements that ________.

A. some foreigners are interested in working in China.

B. it’s not easy for web design graduates to get a job.

C. female Beijingers would like to advertise in a newspaper.

D. all the laid-off workers have applied for a job in a newspaper.

58. Which of the following statements is NOT TRUE?

A. A retired CEO would like to teach in China.

B. A bodybuilding instructor has to speak 4 foreign languages.

C. A Beijinger has rich experience in human resource management.

D. If a company wants a web designer it can call at 0311-3160000.