请简述影响萃取尾气氟吸收的因素有哪些？
参考答案：
（1）雾化效果
（2）洗涤液的氟硅酸浓度
（3）洗涤液温度
（4）堵塞情况
（5）故障
把人体体腔分为胸腔和腹腔的结构是______．
同义句转换，一空一词。
小题1:You’d better drink a lot of water and stay in bed.
You’d better drink __________ __________ water and stay in bed.
小题2:There are over 1,000 students here.
There are ____________ __________ 1,000 students here.
小题3:What’s wrong with you? What’s the __________ with you?
