【简答题】Unique to poultry, it is located above the cloaca and connected with the cloaca. Its main function is to produce B lymphocytes. The organ involved in humoral immunity is( ).
【单选题】采用( )方法可减少淬火钢中的残余奥氏体,稳定其尺寸。
【单选题】下列激素药物中,靶器官为乳腺的药物是 ( )
【单选题】采用( )方法可减少淬火钢中的残余奥氏体。
【单选题】What is mentioned about fair trade?
A.
Its main function is to ensure authenticity.
B.
It is most prevalent among Mexican workers.
C.
It applies to nearly the entire inventory.
D.
It is judged by a single organization.