心肌梗死症状中最先出现下列哪一项（）
A.发热
B.疼痛
C.恶心、呕吐
D.呼吸困难
E.昏厥
参考答案：B
动物卫生监督机构及其工作人员进行监督检查，（）费用。
A.不得收取任何
B.可以收取检测
C.可以收取监测
D.可以收取检疫
按要求转换句型。
1. I have already packed the camera.(改为否定句)
I _____ _____ the camera _____.
2. We are ready.(改为一般疑问句)
_____ you _____?
3. I have locked the window.(改为一般疑问句)
_____ you _____ the window?
4. She has cleaned her room.(改为否定句)
She _____ _____ her room.
5. What about your brother?(改为同义句)
_____ _____ your brother?
