正确答案: ABD

见贤思齐 望梅止渴 谈虎色变

题目：下列选项中．属于学习现象的有

解析：ABD

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举一反三的答案和解析：

[单选题]A moment's drilling by the dentist may make us nervous and upset. Many of us cannot stand pain.To avoid the pain of a drilling that may last perhaps a minute or two, we demand the "needle"— a shot of novocaine (奴佛卡因) -that deadens the nerves around the tooth.

how to handle pain

解析：答案：C

[单选题]由抽象上升到具体是指

从思维的抽象到思维的具体

[多选题]我国《婚姻法》规定，结婚必备的条件有

必须男女双方完全自愿

必须达到法定婚龄

必须符合一夫一妻制

解析：BCD

[单选题]Text 3The full influence of mechanization began shortly after 1850, when a variety of machines came rapidly into use. The introduction of these machines frequently created rebellions by workers who were fearful that the machines would rob them of their work. Patrick Bell, in Scotland, and Cyrus McCormick, in United States, produced threshing machines. Improve- meats were made in plows to compensate for different soil types. Stream power came into use in 1860s on large farms. Hay rakes, hay-loaders, and various special harvesting machines were produced, Milking machines appeared. The internal-combustion engine run by gasoline became the chief power source for the farm.

ingenious improvements were made in fanning machines in the 1860s to yield production

解析：答案：D

[单选题]中药药性中，五味的确定是

从药物疗效中推导为主，以口尝获得为辅 E．从口尝、鼻嗅中获得

[单选题]消化性溃疡慢性穿孔的最常见部位是

十二指肠后壁

解析：

70．答案：D

[考点] 消化性溃疡并发症

[分析] 消化性溃疡急性穿孔多发生在前壁，引起弥漫性腹膜炎；而慢性穿孔的最常见部位是后壁，与相邻的实质器官粘连。