根据句意及汉语提示填空。

1. The children can learn a lot of _______ (知识) on TV.

2. Which do you prefer, reading or _______ (绘画)?

3. I think pigs are really very _______ (愚蠢的).

4. His face looks very black and _______ (丑陋的), but his heart is very kind and beautiful.

5. Hobbies help people relax after their _______ (日常的) work.

直接凝集反应与间接凝集反应的根本区别是（）

A.参与反应pH不同

B.参与反应介质中电解质的浓度不同

C.前者采用颗粒性抗原，后者是将可溶性抗原吸附于载体颗粒上

D.判断结果是在抗原抗体反应的不同阶段

E.参与反应介质中的电解质不同