复极化
参考答案:细胞发生去极化后,又向原先的极化方向恢复的过程。
根据句意及所给提示,补全单词或用单词、固定短语、固定搭配的正确形式填空。
1. My teachers ask us to p_________ reading English everyday.
2. He is twenty years old and today is his _________(twenty) birthday.
3. Danny does his homework as __________(careful)as his students.
4. I want to have my ________(自己的)house.
5. Everyone __________(尽最大努力)to do this work in our group.
复合树脂的化学引发体系一般由()构成
A.过氧化物-芳香叔胺
B.过氧化物-樟脑醌
C.樟脑醌-芳香叔胺
D.芳香叔胺