能通过自分泌和旁分泌促进T淋巴细胞增殖的细胞因子是（）
A.IL-1
B.IL-2
C.IL-4
D.TNF-β
E.TNF-α
参考答案：B
— Do you have a plan for May Day holiday?___
— I'm going to Thailand with my parents! [ ]
A. You don't say!
B. You can say that again.
C. Good luck to you.
D. I dare say.
厚朴保肝作用的有效成分是（）
A.厚朴酚
B.和厚朴酚
C.厚朴生物碱
D.厚朴皂苷
E.四氢厚朴酚
