在膀胱底的内面，由两个输尿管口和 * * 内口形成的三角形区域，称为（）。
参考答案：膀胱三角
氧化还原反应的实质是（ ）
A．分子中的原子重新组合
B．氧元素的得失
C．电子的得失或共用电子对的偏移
D．化合价的改变
根据句意和所给的首字母提示，补全句子中的单词。
1. His p _________wag to graduate from medical school and become a great doctor.
2. Uncle Bill does well in taking photos.He is a good p__________.
3. If you find someone smoking at school,you should r __________ it to your teacher right away.
4. The famous singer is a __________on CCTV next month.
5. Can you i _________what the life without light would be like?
