问题
问答题 简答题
为什么要控制药剂用量？
答案
参考答案：
药剂用量不足达不到调节矿物表面性质的目的，难以使矿物分选，用量过多，则会引起相反的作用，不但造成药剂浪费，甚至破坏了浮选过程。
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为什么要控制药剂用量？
参考答案：
药剂用量不足达不到调节矿物表面性质的目的，难以使矿物分选，用量过多，则会引起相反的作用，不但造成药剂浪费，甚至破坏了浮选过程。
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| Once a family of three (husband, wife, and their young daughter) were so poor that they had nothing to eat. Being desperate (绝望的), the husband went out into the forest to look for food but found 1 . Just then he found a man suddenly 2 before him. The man asked him, " 13 do you have such a look of desperation?" The husband said, "I've no food for my daughter." The man said, "Bring your daughter to me, and I'll 14 her." Realizing the strange man must be God, the husband was so relieved that he 15 ran for his home to 16 his daughter. Picking his daughter up, the father walked back as fast as possible to the meeting area, where the man was 17 for them patiently. The man looked lovingly at the girl, saying to the father, "I'll take her with me to a place where she'll not go 18 any more." Having taken their poverty (贫穷) into 19 , the father agreed. Then the man took her away. Several 20 later, the young girl became a young woman. One day the man had to be away for a period and asked her to keep the key to a box. The young woman 21 the task. Before the man handed her the key, he warned her not to open the box. 22 , as she was ensuring the safety of the 23 one day, she was so 24 about its contents that she unlocked it. She found nothing inside it, but she had 25 the man who saved her from starvation. She locked the box again. 26 turning around, she found the man standing behind her, who was looking at her with such a look of grief and 27 that it broke her heart. She felt ashamed and cried. Seeing this, the man decided not to punish her. Then he placed a hand under her chin (下巴) to 28 her face. As the young woman 29 the man's eyes, she saw 30 , and her heart began to mend. From the story, we should learn to be kind and forgive others. | ||||
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