combustionprocess
A. 助力转向
B. 燃烧过程
C. 液晶显示
D. 怠速控制
air-fuelmixture
A. 变速器档位开关
B. 车轮速度传感器
C. 循环球式转向器
D. 空气燃油混合气
An immunoglobulin-secreting plasma cell is developmentally most closely related to a
A. B lymphocyte
B. fibroblast
C. mast cell
D. colony-forming cell
E. T lymphocyte
Surgical removal of the thymus from a neonate (新生儿) would result in drastically depleted numbers of which of the following cell types?
A. B cells
B. Mast cells
C. T cells
D. Plasma cells
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