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成人高等教育 / 农业概论

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农业概论

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佳题速递：

按预测经济活动的范围划分，可以将运量预测分为______和______。(A) 运输生产者出售服务的愿望 (B) 提供运输服务的能力 (C) 实现量价关系的均衡 (D) 运输对象对于位移的需求 (E) 运输对象的空间差交通运输经济

肺通气的直接动力来自生理学（影像）

教育传播中，用来传递和获取教育、教学信息的工具是（）教育技术与媒体

我国专利法中的讲的“发明创造”是指( )(A) 发明 (B) 发现 (C) 实用新型 (D) 外观设计经济法

2、It was getting dark. Some children and two Canadian women were still _ _ _ 21 _ _ _ on the ice near a big hotel. They were having a good time. Suddenly the ice broke. One of the boys fell into the water. The children shouted, “Help! Help!” They didn't know what to so. The two Canadian friends heard _ _ _ 22 _ _ _ and skated over to get the boy out of the water. The ice was thin. The two Canadians fell into the water, too. But they tried their best to _ _ _ 23 _ _ _ the little boy. They knew they must be quick. If they didn't push him up onto the ice, he would soon die. Many people ran over to help.Some of them had ropes and poles. A young man jumped into the water to save the _ _ _ 24 _ _ _ people. The boy and the two Canadian women were out of water at last. One of the women didn't feel well. She was sent to the _ _ _ 25 _ _ _ at once. But she felt very happy because the boy was safe.统考英语完型填空

对于流体动力润滑的滑动轴承，其最小油膜厚度主要受轴径和轴承表面粗糙度、轴的刚性、轴承与轴径的几何形状误差等的限制。正确错误机械设计