闪蒸出料含水量高的原因有（）。
A、蒸发一段出料浓度低
B、闪蒸负荷变化太快
C、闪蒸罐压力高
D、闪蒸预热温度低
参考答案：A, B, C, D
某地区，腰背痛患者高发，严重者日夜全身剧痛，四肢弯曲变形，甚至被迫长期卧床，经调查该地区受到附近一家铅锌矿排放污水的污染，经临床检查，该地区患者的尿中主要出现下列物质增多，除了（）
A.白蛋白
B.镉
C.糖
D.低分子蛋白
E.钙
用括号内所给词的适当形式填空。
1. Did you expect _____ (see) your father?
2. You can see the picture on the wall over _____ (people) heads.
3. Is it the band which gets everyone _____ (dance)?
4. His grandmother is famous as a _____(photograph).
5. Those drums are really _____ (loud).
e picture on the wall over _____ (people) heads.
e drums are really _____ (loud).