暴露评估exposure assessment
参考答案：
对食用食品的同时可能摄入生物、化学和物理物质和其他来源的暴露所作的定性和（或）定量评估。
用延续性动词改写下列句子。
1. The man has left China. The man has _____ _____ _____ China for 20 years.
2. The movie has finished. The movie has _____ _____ for half an hour.
3. I have borrowed the book. I have _____ the book for a month.
4. He has joined the Party. He has _____ _____ the Party for 30 years.
5. I have bought the bike. I have _____ the bike for 6 years.
火灾报警系统探测器的警示灯应安装在（）方位。
A、便于人员观察
B、隐蔽
C、越高越好
D、没有要求
