转座子免疫
参考答案：
指某些转座子阻止其它同类型转座子向相同DNA分子中转移的能力。有多种机制。
心搏骤停最主要的特征是（）和（）。
补全下列反意疑问句。
1. They often watch TV, ______?
2. She doesn't have any brothers, ______?
3. Jenny has bought a new hat, ______?
4. My brother finished his homework, ______?
5. We aren't having an English class now, ______?
