A．
B．
C．
D．
参考答案：A
促进Th0细胞向Th2细胞分化的细胞因子有（）
A.IL-2
B.IL-4
C.IL-12
D.EPO
E.INFT
If you ___ stick to the unrealistic approach, the worse result will be waiting for you not far ahead.
A．will
B．may
C．must
D．can
