题目

38. –How does his explanation _____ to you? --Well, quite reasonable and acceptable. A.look  B. feel  C. come  D. Sound 答案：D一只雌蛙能产卵4000—5000个，但卵受精后只有少数发育为成体。出现这种现象是由于：A.过度繁殖B.生存斗争C.遗传和变异D.适者生存