“四君子”的传统题材是 ( )
A.国画山水
B.国画人物
C.国画花鸟
D.仕女画
参考答案:C
Fill in the blanks. 请在横线上填入所缺的句子。
1. A: ?
B: Lily is hungry.
2. A: Would you like a hamburger?
B: .
3. A: ?
B: Li Ming is on the train.
4. A: ?
B: I would like a glass of milk, please.
5. A: May I have some tea, please?
下图表示某淋巴细胞,膜外颗粒为抗体,请回答:
抗体的化学本质是(),它能与()发生特异性结合,发挥免疫效应。