题目内容

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

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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

Hassall corpuscles are characteristicof which of the following?

A. Blood
B. Keratinizing cells
C. Spleen
D. Red bone marrow
E. Thymus

直角角焊缝的有效厚度he为1.2 hf。

A. 对
B. 错