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【单选题】
The characteristics of B cell response to TI-2 antigen include
A.
TI-2 antigen has duplicate epitopes
B.
Activating only mature B cells
C.
BCR excessive cross-linking leads to immune tolerance
D.
Inducing isotype switching of antibodies
E.
All of the above
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参考解析：
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【单选题】Which is wrong about the responses of B cells to TI-1 antigen
A.
TI-1 antigen has the properties of mitogen
B.
Producing low affinity IgM
C.
High concentration of TI-1 antigen activates polyclonal B cells
D.
Mature B cells can be activated.by TI-1 antigens
E.
Immature B cells cannot be activated
【单选题】TI-1 antigen includes
A.
Toxoid
B.
Antitoxin
C.
Lipopolysaccharide
D.
Protein
E.
Animal serum
【单选题】TI-2 antigen includes
A.
Toxoid
B.
Diphtheria toxin
C.
Tuberculin
D.
Protein
E.
Pneumococcal capsular polysaccharide