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【单选题】
免疫系统的组成是A.
中枢免疫器官、外免疫器官
B.
免疫细胞、粘膜免疫系统、中枢免疫器官
C.
中枢免疫器官、免疫细胞、皮肤免疫系统
D.
免疫分子、黏膜免疫系统、皮肤免疫系统
E.
免疫器官和组织、免疫细胞、免疫分子
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【单选题】In an evaluation of an 8-year-old who has recurrent infections since the first year of life, findings include enlargement of the liver and spleen, lymph nod inflammation, and a superficial dematitis r...
A.
Defect in the enzyme NADPH oxidase
B.
Defect in the enzyme adenosine deaminase （ ADA ）
C.
Defect in the IL-2 receptor
D.
Developmental defect at the pre-B stage
E.
Developmental failure of pharyngeal pouches 3 to 4
【简答题】Mid-IB at a glance The summer vacation is the time to consolidate（巩固）your learning and prepare for the year ahead. In July and August Oxford Study Courses will once again hold its Mid-IB Summer School...
【简答题】European women were in great demand in New Zealand in those early times. That is, women prepared to marry the many single men who arrived at the colony among the first whalers and settlers and now had...
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