问题 单项选择题 A1/A2型题

下列哪项符合M3的MIC分型().

A.CD13+,CD33+,HLA-DR-,t(15;17),PML-RARα

B.CD13+,CD33+,t(8;21),AML1/ETO

C.CD13+,CD33+,tnv(16),CBFB/MYH11

D.CD41+,CD33+,t(1;22)

E.CD13+,CD33+,t(6;9),DEK-KLAE

答案

参考答案:A

解析:急性早幼粒细胞白血病(M3)的免疫学标志:典型的免疫表型呈CD13、CD33阳性、CD34及HLA-DR为阴性者M3型的可能性大。CD34阳性的APL恶性细胞颗粒小和少,且易出现白细胞计数增高,预后较差。染色体及分子生物学检验:70%~90%的APL具有特异性的染色体易位t(15;17),是APL特有的遗传学标志,t(15;17)染色体易位使17号染色体上的维甲酸受体α(RARα)基因发生断裂,与15号染色体上的早幼粒细胞白血病(PML)基因发生融合,形成PML-RARα融合基因。

多项选择题
单项选择题

There is virtually no limit to how one can serve community interests, from spending a few hours a week with some charitable organization to practically full-time work for a social agency. Just as there are opportunities for voluntary service (1) (VSO) for young people before they take up full-time employment, (2) there are opportunities for overseas service for (3) technicians in developing countries. Some people, (4) those who retire early, (5) their technical and business skills in countries (6) there is a special need.

So in considering voluntary or (7) community service, there are more opportunities than there (8) were when one first began work. Most voluntary organizations have only a small full-time

(9) and depend very much on volunteers and part-timers. This means that working relationships are different from those in commercial organizations, and values may be different. (10) some ways they may seem more casual and less efficient, but one should not (11) them by commercial criteria. The people who work with them do so for different reasons and with different (12) , both personal and (13) . One should not join them (14) to arm them with professional experience; they must be joined with commitment to the (15) , not business efficiency. Because salaries are (16) or non-existent many voluntary bodies offer modest expense. But many retired people take part in community service for (17) , simply because they enjoy the work.

Many community activities possible (18) retirement were also possible during one’s working life but they are to be undertaken (19) seriously for that. Retired people who are just looking for something different or unusual to do should not consider (20) community service.

20()

A. to be taken

B. to take

C. taking

D. being taken