幽门螺杆菌是十二指肠溃疡发病的一个次要因素
参考答案：错
仿照例句写句子。
例：This is a cap. It's Green. ---This cap is Green.
1. That's an apple. It's red. ---________________________________________
2. This is a desk. It's yellow. ---________________________________________
3. This is my eraser. It's white. ---________________________________________
中国的近代警察建立在( )
A．明朝前期B．明朝末期C．清朝前期D．清朝末期
