“稻花香里说丰年，听取蛙声一片”夏季青蛙高声鸣叫的行为是（ ）
A．取食行为
B．防御行为
C．繁殖行为
D．攻击行为
A、取食行为：是动物通过各种方式获取生存所需的食物的行为．
B、防御行为：为了保护自己，防御敌害的各种行为都是防御行为．如逃跑、装死、释放臭气、保护色、警戒色、机体防御等．
C、繁殖行为：与动物繁殖有关的行为．如占巢、求偶、交配、孵卵、哺育等一系列行为．
D、攻击行为：同种动物个体之间常常由于争夺食物、配偶、领地或巢区而发生相互攻击或战斗．
“稻花香里说丰年，听取蛙声一片”，体现了动物的繁殖行为．蛙声是雄蛙为了吸引雌蛙前来属于繁殖行为中的求偶行为．
故选C．
It was the last day of the final examination in a large eastern university. On the steps of one building, a group of engineering students were talking about the exam that was going to begin in a few 36 . On their faces was confidence . This was their last exam — then on to 37 and jobs. Some talked of jobs they already had; others talked of jobs they 38 get. With the certainty of four years of college, they felt ready and able to take 39 of the world. The coming exam, they knew, would be a(n) 40 task. The professor had said they could bring 41 books or notes they wanted, requesting only that they did not 42 each other, during the test. 43 they entered the classroom. The professor passed out the papers. And smiles 44 on the students’ faces as they noted(注意到) there were only five essay-type questions. Three hours had passed 45 the professor began to collect the papers. The students no longer looked confident. On their faces was a frightened expression. Papers in hand, no one spoke as the professor faced the class. He looked at the 46 faces before him, and then asked, “How many completed all five questions?” 47 a hand was raised. “How many answered four?” Still no hands. “Three? Two?” The students moved restlessly （不安地,慌张地）in their seats. “One, then? Certainly somebody finished 48 .”But the class remained silent. The professor put down the papers. “That is exactly what I 49 ,” he said. “I just want to impress upon you that, 50 you have completed four years of engineering, there are still many things about the 51 you don’t know. These questions you couldn’t answer are relatively(相对地,相当地) 52 in everyday practice. ” Then smiling, he added, “You will all 53 this course, but remember — even though you are now college graduates, your education has just 54 .” The years have 55 the name of this professor, but not the lesson he taught.
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