肿瘤形成原因包括______
A.化学性
B.物理性
C.生物性致癌因素
D.机体抗肿瘤能力降低
E.年龄、遗传因素
参考答案:A,B,C,D,E
根据句意及首字母提示完成句子。
1. I got a g________ from my parents on my thirteenth birthday.
2. Last Sunday, we went to the a________ to see the seals.
3. You can often see local kids h________ out at the mall.
4. This is a p________ of my family. We took it last year.
5. Will you buy me s________ when you visit Hong Kong?
中共十七届四中全会通过了《中 * * 关于加强和改进新形势下党的建设若干重大问题的决定》。中 * * 党在长期执政实践中,探索形成了加强自身建设的基本经验。在党的建设中必须把( )建设放在首位。
A.执政能力
B.先进性
C.思想理论
D.党风廉政