膀胱癌的恶性程度取决于
A．浸润膀胱壁的深度
B．肿瘤的大小和数目
C．组织学等级
D．血尿的程度
E．患者的年龄
参考答案：A
补全对话。
A: Do you like animals, Peter?
B: 1 I often go to the zoo with my friends.
A: 2
B: My favourite animal is the monkey.
A: Does the monkey like eating meat?
B: 3 It eats fruit.
A: Where is the monkey from?
B: 4
A: Sichuan? The pandas live there, too.
B: 5 Sichuan is the pandas' hometown.
1. ______________
2. ______________
3. ______________
4. ______________
5. ______________
60钴全挡时所需铅的厚度是多少个半价层（）
A.1
B.3
C.5
D.7
E.9
