正确答案: B

防御功能

题目：扁桃体能产生淋巴细胞，具有：

解析：B

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举一反三的答案和解析：

[单选题]互见中，下列说法正确的是________。

A和B均不正确

[单选题]对每一呼吸器都应配有一根长度至少30m的_______。

耐火救生绳

[单选题]After the SSP being checked by a duly authorized officials of a port State, whom should be reported to by the ship immediately?

The CSO