腮腺造影表现为腺泡不规则充盈缺损，造影剂外溢的病变是
A．阻塞性腮腺炎B．腮腺恶性肿瘤C．复发性腮腺炎D．涎石病E．腮腺腺瘘
参考答案：B
句型转换。
1. We are in Beijing. (就划线部分提问)
_____ _____ we?
2. Can you bring the ruler to me? (作出否定回答)
No, _____ _____.
3. I draw pictures on the wall. (变为否定句)
I _____ _____ pictures on the wall.
4. We have two new students in our class. (变为同义句)
_____ _____ two new students in our class.
5. There's an English book in the desk. (变为复数句)
_____ _____ English _____ in the desks.
分子印迹酶
