下列哪种疾病的变应原是半抗原（）。 A.风湿性关节炎 B.系统性_爱下问搜题

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问题单项选择题 A1/A2型题

下列哪种疾病的变应原是半抗原（）。

A.风湿性关节炎

B.系统性红斑狼疮

C.青霉素治疗后发生的溶血性贫血

D.农民肺

E.对移植肾的排斥反应

答案

参考答案：C

选择题

Mrs Brown isn’t here. She has to _______ her son at home. [ ]

A. look for

B. look up

C. look after

D. look at

选择题

I ____ him ____ he left school.

A. have recognized; since
B. have known; since
C. had recognized; before
D. had known; after