简述从选矿学、矿物加工学到资源加工学三者之间的发展关系。
参考答案:资源加工学是由传统的选矿学、矿物加工学发展演变形成的新的学科体系。
根据句意完成句子。
1. The i ______is interviewing a famous person.
2. ______ ______ (吃蔬菜) is good for your health.
3. You are a good girl, so you must look______ your little sister.
4. Eating ice cream is bad ______our health.
5. I eat a lot ______vegetables every day.
开关柜出厂试验,分闸装置在额定电源电压的()(直流),应可靠动作。
A.60%~110%
B.60%~120%
C.65%~110%
D.65%~120%