紫外线治疗的禁忌证为（）
A.急性创伤
B.红斑狼疮
C.烧伤
D.结核
E.湿疹
参考答案：B
单句改错。
1. I'm going on December, and I'm staying for three weeks. ( )____________
A B C D
2. What are you going for vacation? ( )____________
3. Where are you going? For the shop. ( )____________
4. I always take vacations on Europe. ( )____________
5. This time I want to do different something. ( )____________
民用建筑内火灾应急广播扬声器应设置在走道、大厅等公共场所，每个扬声器的额定功率应满足（）。
A、不大于2W
B、不小于2W
C、不大于3W
D、不小于3W
