题目内容

The organs where mature lymphocytes settle down include

A. Thymus
B. Pancreas
C. Bursa of Fabricius
D. Liver
E. Lymph nodes

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The functions of spleen don’t include

A. It provides a place for T and B cells to settle down
B. It can produce secretory IgA and mediates mucosal immunity
C. It provides a place for immune response
D. Hematopoiesis
E. Blood storage

颜色产生的条件为()、()、()。

当一束白光通过()后,按照不同波长展开的现象,称为光的()。

色素的发色理论包括()学说、()学说、()理论。

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