The thymus gland,______is located in the upper part of the chest, produces cells

游客2024-01-02 9

问题 The thymus gland,______is located in the upper part of the chest, produces cells that help fight infection.

选项 A、it
B、who
C、that
D、which

答案 D

解析 Which agrees with its referent, the thymus gland.

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