题目内容
OC与非门和OD与非门的逻辑功能相同，且都能实现“线与”功能。
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Translate the paragraph below into Chinese.Great leaders are almost always great simplifiers, who cut through argument, debate and doubt to offer a solution everybody can understand and remember. Churchill warned the British to expect “blood, toil, tears and sweat”; FDR told Americans that “the only thing we have to fear is fear itself”; Lenin promised the war-weary Russians peace, land and bread. Straightforward but potent messages.
底线是由量变到质变的一个临界值，一旦量变突破底线，即达到质变的关节点，事物的性质就会发生根本性的变化，这是（ ）。
古人云：“凡事预则立，不预则废。”这其中蕴含着（ ）。
中药鉴定学的任务有______。
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