问题
问答题
电解液为什么要循环？
答案
参考答案：
①使电解液中Cu2+、H2SO4浓度均匀，②使电解液温度均匀，③使添加剂分布均匀。
搜题请搜索小程序“爱下问搜题”
电解液为什么要循环？
参考答案：
①使电解液中Cu2+、H2SO4浓度均匀，②使电解液温度均匀，③使添加剂分布均匀。
| 完形填空。 | ||||
| One day a man went to see his friend. His friend lived far away, so he took some bread 1 him 2 his lunch.When he walked along, he thought, "My friend is sure to give me a nice meal and 3 to eat." He took out his bread and looked 4 it, "It's so dry. What's the use of it?" 5 these words, he threw the bread on the road. Later he 6 to a river. There wasn't a boat by the river. And he 7 to the other side of the river. He hoped to have a boat to take him over, so he sat by the river and waited. He waited and waited 8 the sun went down in the west, but he couldn't see a boat. He stood up and started 9 back home. Soon he felt very hungry. He wanted very much to have something to eat, but he had nothing with him. Suddenly he saw some dry, hard bread in the middle of the road. He 10 and began to eat. | ||||
|