启动休止期的B细胞进入DNA合成期的细胞因子是（）。
A.IL-2
B.IL-4
C.IL-6
D.IL-8
E.IL-9
参考答案：B
情景交际。
1. 当你祝别人新年快乐应说：[ ]
A. Happy New Year.
B. Merry Christmas.
C. Happy birthday.
2. 当别人对你说：“Merry Christmas”时，你应说：[ ]
A. Sure
B. Merry Christmas
C. Sorry
3. 当你问对方“你最喜爱的季节是什么？”时，应说：[ ]
A. What season do you like?
B. Do you like the season?
C. What's your favourite season?
4. 当你想说：收音机太吵了，请把它调小点应说：[ ]
A. The radio is too loud. Please turn it on.
B. The radio is too loud. Please turn it up.
C. The radio is too loud. Please turn it down.
5. 当你想说：我喜欢吃饺子应说：[ ]
A. I like to eat dumplings.
B. I like to make dumplings.
C. I eat dumplings.
是由多个葡萄糖组成的带分支的大分子多糖（）
A．糖原
B．糖酵解
C．糖异生
D．单糖
E．有氧氧化
