关于白斑的临床表现下列哪项说法是错误的
A.病损有对称性
B.斑块白色或灰白色
C.可发生在口腔黏膜任何部位
D.损害大小不一
E.损害大小与恶变之间无平行关系
参考答案:A
按要求完成句子
1. I was three years old when I started doing the things.(对画线部分提问)
_____ _____ _____ you when you started doing the things?
2. I went to the zoo last Sunday.(对画线部分提问)
What _____ _____ _____ last Sunday?
3. I saw some sharks.(改为一般疑问句)
_____ you _____ _____ sharks?
4. The students had a terrible school trip.(改为否定句)
The students _____ _____ a terrible school trip.
厂内运输事故的原因是多方面的,一般涉及到()
A、人
B、天气
C、车辆
D、道路环境