[单项选择]急性白血病易发生感染，主要由于
A. 幼稚淋巴细胞
B. Reed-Sternberg细胞
C. 组织细胞
D. 纤维细胞
E. 浆细胞

A continuing phenomenon in business education is the emphasis on ethics. The American Assembly of Collegiate Schools of Business (AACSB) accreditation standards emphasize the need for an ethical awareness along with an understanding of "influence of political, social, legal and regulatory, environmental, and technological issues..." 61) One of the difficult ethical challenges it wants addressed concerns " inclusiveness," which we have interpreted to mean a "large umbrella" approach, in, for example, employee concerns. To this end, matters such as sexual preference are dealt with in a case involving a supervisor. 62) Possibly the greatest ethical idea that could build bridges in an increasingly fragmented society is the idea that empirical evidence must be sought and used to bring an agreement in controversial public issues.
Clearly the greatest impact upon the business enterprise evidencing external political and social environments occurs wi

Methods of studying vary; what works (21) for some students doesn’t work at all for others. The only thing you can do is experiment (22) you find a system that does work for you. But two things are sure: (23) else can do your studying for you, and unless you do find a system that works, you won’t go through college. Meantime, there are a few rules that (24) for everybody. The hint is "don’t get (25) ".
The problem of studying, (26) enough to start with, becomes almost (27) when you are trying to do (28) in one weekend. (29) the fastest readers have trouble (30) that. And ff you are behind in written work that must be (31) , the teacher who accepts it (32) late will probably not give you good credit. Perhaps he may not accept it (33) . Getting behind in one class because you are spending so much time on another is really no (3
A. help
B. encourage
C. assist
D. improve