不同的含液器官或病变，后方回声增强强度不尽相同其中后方回声增强相对较不显著的是
A．胆汁B．囊肿液体C．胸腔积液D．血液E．尿液
参考答案：D
句型转换。
1. The designer designed the casual clothes. (改为被动语态)
________________________________________
2. The bus is very big, it can hold ten people. (同义句)
The bus is ______ ______ to hold ten people.
3. They worked in the hospital for 9 hours yesterday. (对划线部分提问)
______ ______did they work in the hospital yesterday?
4. The show will start at 10:30 tomorrow morning. She said. (连成一个宾语从句)
She said ______ the show ______start at 10:30 tomorrow morning.
5. We will meet at our school gate at 8:00 tomorrow. (对划线部分提问)
______ and ______shall we meet?
卤代烷灭火系统不适用大中型图书馆和档案库。（）
